Documentation

Introduction

This module manual provides information abouthreshold programming the North Atlantic Industries, Inc. (NAI) Discrete Function Module:DT5. This module is compatible with all NAI Generation 5 motherboards. The DT5 Discrete module is a digital I/O 32-Bit Enhanced Functionality module that provides 16 individual channels that either can be used for input voltage measurements, or as a bidirectional current switch. The channels are programmable in enhanced mode to enable Pulse Width Modulation, Pattern Generation and Pulse Timing measurement capability.

Features

•16 channels available as inputs or outputs •Programmable for Input voltage or switch closure for each channel •Continuous background built-in-test (BIT) (during normal operation, status provided for channel health and operation feedback) •In bidirectional current switch mode, enhanced features can be used to trigger switch opening or closure using pulse width, number of pulses or pattern generation •Ability to read switch I/O voltage and current •Ability to handle switch closure currents of up to 625 mA DC •Automatic switch overcurrent protection, programmable to 625 mA max •Open Circuit Detection •Supports ‘dual turn-on' (series channel output) applications (e.g. dual series ‘key' missile launch control) •Clean, bounce-free switching

INPUT CHARACTERISTICS

Input Range:

±80 V (peak) / ±60 V (typical)

Input Pulse Detection:

A pulse of 40µs min. width will be sensed and indicated by the appropriate Hi–Lo or Low-High Transition Interrupt.

Input Impedance:

2 MΩ / (200 kΩ if/when Open Circuit Detect Logic enabled)

Switching Threshold:

Levels are programmable from 0 to 80 Vrms with 10-bit resolution (0.98% FS) On/Off.

Accuracy of Set Point:

The greater of 5% signal value or 0.25 V.

ON/OFF Differential

0.5 V min. recommended.

Debounce:

Programmable per channel from 0 to 10µs x 232 (LSB= 10 μs; 32-bit resolution).

Update Rate:

Each channel is updated every 10 μs.

Overvoltage Protection:

Input clamped at ±80 VDC.

Voltage Measurement:

User can read output voltage of each channel (isolated 10-bit A/D) LSB=100mV; Accuracy: ±3 LSB’s (300 mV) over temperature.

Additional Enhanced Input Mode Operation:

Input with debounce filter (Mode 0), measure High Time (Mode 1), measure Low Time (Mode 2), time-stamp of all rising edges (Mode 3), time-stamp of all falling edges (Mode 4), time-stamp of all edges (Mode 5), count total number of rising (Mode 6), falling (Mode 7), all (Mode 8) edges, measure period from rising edge-torising edge (Mode 9),measure frequency (Mode 10).

BIDIRECTIONAL SWITCH

Switch Formats:

Isolated bidirectional (AC/DC) MOSFET switch

Switch Current:

0-625 mA per channel (load determined) / (±80 V peak)

Switch Impedance Open:

2 MΩ / (200 kΩ if/when Open Circuit Detect Logic enabled)

Switch Impedance Closed:

0.5 W typical, 1 W max.

Current Measurement:

User can read AC/DC current through switch, independently for each channel, LSB=3 mA; Accuracy: The greater of ±10% of Signal or ±20mA over temperature.

Measurement Update Rate:

Each channel is updated every 10 µs.

Isolation:

500 V (between channels and each channel to system GND).

Power:

5 VDC/0.98 A max.

Weight:

1.5 oz. (42 g)

Additional Enhanced Output ModeOperation:

PWM Continuous Output, PWM Burst (n-times), and Pattern Generator Output.

Principle of Operation

DT5 provides 16 independent, isolated, programmable channels that either can be used for input voltage measurements (+/-60 V), or as a bidirectional current switch (up to 625 mA per channel). With the switch closed,both the current through the switch and the voltage across the switch can be monitored. These modules include diode clamping on each channel. Clamping is useful for inductive loads, such as relays and short circuit protection. The DT5 Mode Select register provides 13 Mode settings. Each channel can be set to any of the different input or output modes. All settings provide BIT fault detection, which enables flagging of non-compliant outputs or inconsistent input readings between dual input measurements. All 16 channels are galvanically isolated from each other and from system ground. Each channel’s two-wire connection can function as an isolated voltage input or as an isolated bidirectional switch. When programmed to function as a bidirectional switch, a channel can control valves mechanical relays, indicators, etc. without concern about grounding. This module provides an automatic background built-in-test (BIT) for each channel. The BIT functions are always enabled and continually check that each channel is functioning properly. Standard input operation is used for voltage sensing and measures both AC and DC input voltages. When operating as a switch, measurements for both voltage across and current through the switch closure are available. Current and Voltage measurements are available as both instantaneous and averaged (RMS). Four input voltage threshold levels (Maximum High, Upper, Lower, Minimum Low) are programmed to user defined high and low voltage levels. All four of the threshold levels must be set for each Input or Output channel. Threshold crossing may be programmed to generated interrupts on a change of state. The module design utilizes state of the art galvanic isolation that is superior to alternatives such as optocoupler devices. The galvanic isolation eliminates typical optocoupler design concerns such as uncertain current transfer ratios, nonlinear transfer functions and temperature/lifetime degradation effects.

Input/Switch Interface

Each channel contains a both an isolated differential amplifier and a dual N-Channel MOSFET, configured as isolated Solid-State Relay (SSR). The SSR is energized, so both AC and DC current can flow through the channels I/O pins. The MOSFET presents a low ~.5 Ω on impedance. The module contains circuitry to measure the current through the SSR and the voltage present on the I/O pins.

Open Circuit Detection

Each of the 16 channels can be set to indicate an open circuit by setting the Open Circuit Detection register for the channel to 1. A voltage reading of 3.3 V indicates that the channel is open. Default (normal operation) is 0 V.Set the Maximum High Threshold register, for each channel, to this value to generate an interrupt using the Maximum High Threshold Interrupt Enable register.

Note: Added Enhanced Feature; introduced/available on EAR FPGA rev. 3; top-boards rev D (DOM @ 10/2016).

Register Descriptions

The register descriptions provide the register name, Register Offset, Type, Data Range, Read or Write information, Initialized Value, a description of the function and, in most cases, a data table.

Read I/O

Function: Reads High 1 or Low 0 inputs or outputs as defined by internal channel threshold values.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: NA

Operational Settings: NA

Read I/O

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Switch Control

Function: Opens and closes the switch for each channel.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0x 0000 0000

Operational Settings: Write 0 for input; Write 1, for closed switch.

Switch Control

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Open Circuit Detection

Function: Enables a 3.3v pull-up on the channel that may be used for open circuit detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0x0000 0000

Operational Settings: Write integer 1 for open circuit detection. Default is 0, which does not provide open circuit detection. When an open circuit occurs, the voltage read on the channel will be pulled up to ~2.7 V. Normal reading is 0.

An interrupt is generated for open circuit indication, by channel, via the Maximum High Threshold and Maximum High Threshold Interrupt Enable registers.

Note: Added Enhanced Feature; introduced/available on EAR FPGA rev. 3; top-boards rev D (DOM @ 10/2016).

Open Circuit Detection

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Switch State

Function: Reads whether the state of the switch is open or closed.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: N/A

Operational Settings: N/A

Switch State

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Debounce Time

Function: Sets the Debounce time (LSB= 10 μs; 32-bit resolution) for each channel.

Type: binary word (32-bit)

Data Range: 0x 0000 0000 to 0x FFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: The Debounce register, when programmed for a non-zero value, is used with channels programmed as input to “filter” or “ignore” expected application spurious initial transitions. Enter required debounce time into appropriate channel registers. LSB weight is 10 µs/bit (register may be programmed from 0x00000000 (debounce filter inactive) through a maximum of 0xFFFFFFFF (2^32 * 10µs). (full scale w/ 10 µs resolution). Once a signal level is a logic voltage level period longer than the debounce time (Logic High and Logic Low), a logic transition is validated. Signal pulse widths less than programmed debounce time are filtered. Once valid, the transition status register flag is set for the channel and the output logic changes state. Enter a value of 0 to disable debounce filtering. Debounce defaults to 0000h upon reset.

Voltage Reading (Sampled)

Function: Reads actual output voltage at I/O pin per individual channel.

Type: binary word (32-bit)

Data Range: 0xFFFF FDA8 to 0x0000 0258 (usable range)

Read/Write: R

Initialized Value: Updated by module as per conditions

Operational Settings: Value is a signed binary 32-bit word, where LSB = 100 mV. Data is read as 2’s complement number. For example, if output voltage word is 0x00F0 (240d), actual voltage is 24.0 V.

Voltage Reading (Sampled)

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Voltage Reading (Averaged)

Function: Reads averaged RMS value of the output voltage at I/O pin per individual channel.

Type: binary word (32-bit)

Data Range: 0xFFFF FDA8 to 0x0000 0258 (usable range)

Read/Write: R

Initialized Value: Updated by module as per conditions

Operational Settings: Value is an unsigned binary 10-bit word, where LSB=100 mV. For example, if output voltage word is 0x00F0 (240d), actual voltage is 24 V.

Voltage Reading (Averaged)

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Current Reading (Sampled)

Function: Reads actual current through the I/O pins at each channel.

Type: binary word (32-bit)

Data Range: 0xFFFF FEC8 to 0x0000 0138

Read/Write: R

Initialized Value: Updated by module as per conditions

Operational Settings: Value is signed binary 32-bit word, where LSB=2 mA. Read as 2’s complement; Current source is positive, Current sink is negative. For example, if output voltage word is 0x 0064 (100d), actual current is 200 mA.

Current Reading (Sampled)

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Current Reading (Averaged)

Function: Reads averaged RMS current through the I/O pins at each channel.

Type: binary word (32-bit)

Data Range: 0xFFFF FEC8 to 0x0000 0138

Read/Write: R

Initialized Value: Updated by module as per conditions

Operational Settings: Value is signed binary 32-bit word, where LSB=2 mA. Read as 2’s complement; Current source is positive, Current sink is negative. For example, if output voltage word is 0x0064 (100d), actual current is (current source) 200 mA.

Current Reading (Averaged)

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Overcurrent Value

Function: Sets the current value at which the channel will detect an overcurrent condition.

Type: binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 0138

Read/Write: R/W

Operational Settings: LSB = 2 mA

Threshold Programming

Four threshold levels: Maximum High, Upper, Lower, Minimum Low offer maximum user flexibility. All four threshold levels must be programmed. For input or output, the threshold levels will define the logic states. For proper operation, the threshold values should be programmed such that:

Maximum High Threshold > Upper Threshold > Lower Threshold > Minimum Low Threshold

Program Upper and Lower Thresholds, keeping the 0.25 V min. differential in mind, and then add debounce time as required. When the input signal exceeds the Upper Threshold, a logic high 1 is maintained until the input signal falls below the Lower Threshold. Conversely, when the input signal falls below the Lower Threshold, a logic low 0 is maintained until the input signal rises above the Upper Threshold.

Maximum High Threshold

Function: Sets the maximum high threshold value. Programmable per channel from -60 to +60 Vrms, with binary 10-bit word resolution (LSB=100 mv).

Type: binary word (32-bit)

Data Range: 0x FFFF FDA8 to 0x 0000 0258 (usable range)

Read/Write: R/W

Initialized Value: 0x64

Operational Settings: Assumes that the programmed level is the minimum voltage used to indicate a Max. High Threshold. If a signal is greater than the Maximum High Threshold value, a flag is set in the Maximum High Threshold register. The Maximum High Threshold register may be used to monitor any type of high signal voltage condition or threshold such as a “Short to +V” as it applies to input measurement as well as contact sensing applications.

Maximum High Threshold

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Upper Threshold

Function: Sets the upper threshold value. Programmable per channel from -60 to +60 Vrms, with binary 10-bit word resolution (LSB=100 mv).

Type: binary word (32-bit)

Data Range: 0xFFFF FDA8 to 0x0000 0258 (usable range)

Read/Write: R/W

Initialized Value: 0x32

Operational Settings: A signal is considered logic High (1) when its value exceeds the Upper threshold and does not consequently fall below the Lower threshold in less than the programmed Debounce time.

Upper Threshold

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Lower Threshold

Function: Sets the lower threshold value. Programmable per channel from -60 to +60 Vrms, with binary 10-bit word resolution (LSB=100 mv).

Type: binary word (32-bit)

Data Range: 0xFFFF FDA8 to 0x0000 0258 (usable range)

Read/Write: R/W

Initialized Value: 0x1E

Operational Settings: A signal is considered logic Low (0) when its value falls below the Lower threshold and does not consequently rise above the Upper Threshold in less than the programmed Debounce time.

Lower Threshold

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Minimum Low Threshold

Function: Sets the minimum low threshold. Programmable per channel from -60 to +60 Vrms, with binary 10-bit word resolution (LSB=100 mv).

Type: binary word (32-bit)

Data Range: 0xFFFF FDA8 to 0x0000 0258 (usable range)

Read/Write: R/W

Initialized Value: 0x0

Operational Settings: Assumes that the programmed level is the maximum voltage used to indicate a minimum low threshold. If a signal is less than the Minimum Low Threshold value, a flag is set in the Minimum Low Threshold Status register. The Minimum Low Threshold register may be used to monitor any type of low signal voltage condition or threshold such as a “Short to Ground” as it applies to input measurement as well as contact sensing applications.

Minimum Low Threshold

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

D

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

D

D=DATA BIT

Status and Interrupt Registers

The registers may be set for any or all channels and will latch if a transition is detected on a channel or channels. Each channel(s) will remain latched until the channel is cleared. Multiple channels may be cleared simultaneously, if desired. Each channel bit in the register is polled for a read status. Any subsequent channel(s) transition, if detected, will propagate through to be read (rolling-latch). Once the status register has been read, the act of writing a 1 back to the applicable status register to any specific bit (channel) location (bit mapped per channel), will “clear” the bit (set the bit to 0) if the actual interruptible event condition has cleared. If the interruptible condition “event” is still persistent while clearing, this may retrigger the interrupt. There is a corresponding Interrupt Enable and vector associated with each “Latched” Status. Each status type may be “polled” (at any time), or is “interruptible” when interrupts are enabled and the associated Interrupt Service Routine (ISR) vectors are programmed accordingly. When programmed for “interruptible” status, interrupts are typically generated and flagged with the programmed vector available as data. The host or single board computer (SBC) typically services the interrupt by a general or specific ISR, which reads the (typically) unique programmed vector (identifier of which status generated the interrupt), reads the associated status register to determine which channel in the status register was “flagged” and then “clears” the status register. This essentially resets the interrupt mechanism, which is now ready to be triggered by the next status register detected event “flag”. “Latched Status” will trigger on either “sense on edge” or “sense on level” based on the settings of the associated Set Edge/Level Interrupt register. Sense on “edge” requires a change from low to high state to trigger the status detection, while sense on “level” is independent of the previous state. Unless otherwise specified, all status or fault indications are bit set per channel.

BIT Dynamic Status

Function: BIT Dynamic Status is set when a redundant measurement is inconsistent with the input measurement level detected.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: 1 is read when a fault is detected. 0 indicates no fault detected.

BIT Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

BIT Latched Status

Function: The BIT Latched Status register is set when a redundant measurement is inconsistent with the input measurement level detected.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: 1 is written when a fault is detected. 0 indicates no fault detected. Write a 1 to clear status.

Notes: Faults are detected (associated channel(s) bit set to 1) within 10 ms (pending characterization).

BIT Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

BIT Interrupt Enable

Function: When enabled, interrupts are generated for each channel when the BIT Latched Status register indicates a fault.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts.

BIT Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

BIT Set Edge/Level Interrupt

Function: Sets BIT Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

BIT Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Overcurrent Dynamic Status

Function: Senses an overcurrent or overload condition for each channel and provides real-time status. The output channel is also immediately disabled at time of overcurrent sensed condition.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: 1 is read when overcurrent or overload condition transition is sensed. 0 indicates normal status.

Notes: Status is indicated (associated channel(s) bit set to 1), within 80 ms (pending characterization).

Overcurrent Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Overcurrent Latched Status

Function: The Overcurrent Latched Status register is set when the channel senses an overcurrent or overload condition and provides latched status. The output channel is also immediately disabled at time of overcurrent sensed condition.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: 1 is written when overcurrent or overload condition transition is sensed. 0 indicates no status. Write a 1 to clear status.

Notes: • Channel(s) shut down by overcurrent sensed can be reset by writing to the Overcurrent Reset register.

Overcurrent Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Overcurrent Interrupt Enable

Function: When enabled, interrupts are generated for each channel when the Overcurrent Latched Status register senses an overcurrent or overload condition for any channel.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts.

Overcurrent Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Overcurrent Set Edge/Level Interrupt

Function: Sets Overcurrent Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

Overcurrent Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Overcurrent Reset

Function: Resets disabled channels in Overcurrent Latched Status register following an overcurrent condition as measured by the Current Reading (Sampled) Register and the value set by the Overcurrent Value register.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: 1 is written to reset disabled channels. Processor will write a 0 back to the Overcurrent Reset register when reset process is complete.

Overcurrent Reset

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Max Hi Threshold Dynamic Status

Function: Indicates voltage signal has exceeded Maximum High Voltage level. Real-time event status.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: Dynamic Status is set when the voltage is above the Max Hi Threshold set in the Maximum High Threshold register. The associated channel(s) bit is set to 1 and is non-latching.

Max Hi Threshold Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Max Hi Threshold Latched Status

Function: The Max Hi Threshold Latched Status register is set when the voltage signal has exceeded Maximum High Voltage level set in the Maximum High Threshold register.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Status is indicated (bit is set) within 500 µs (pending characterization). Write a 1 to clear status.

Max Hi Threshold Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Max Hi Threshold Interrupt Enable

Function: When enabled, interrupts are generated for each channel when the Max Hi Threshold Latched Status register senses that the voltage signal has exceeded Maximum High Voltage level.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts.

Maximum High Threshold Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Max Hi Threshold Set Edge/Level Interrupt

Function: Sets Max Hi Threshold Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

Maximum High Threshold Se Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Min Lo Threshold Dynamic Status

Function: Indicates voltage signal has fallen below Minimum Low Voltage level. Real-time event status.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: Dynamic Status is set when the voltage is below the value set in the Minimum Low Threshold register. The associated channel(s) bit is set to 1 and is non-latching.

Min Lo Threshold Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Min Lo Threshold Latched Status

Function: The Min Lo Threshold Latched Status register is set when the voltage signal has fallen below Minimum Low Voltage level set in the Minimum Low Threshold register.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Status is indicated (bit is set) within 500 µs (pending characterization). Write a 1 to clear status.

Min Lo Threshold Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Min Lo Threshold Interrupt Enable

Function: When enabled interrupts are generated for each channel when the Below Min Lo Threshold Latched Status register senses the voltage signal has fallen below the Minimum Low Voltage level.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts.

Min Lo Threshold Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Min Lo Threshold Set Edge/Level Interrupt

Function: Sets Min Lo Threshold Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

Min Lo Threshold Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Mid-Range Dynamic Status

Function: Indicates voltage signal is in-between Upper and Lower thresholds. Real-time event status.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: Dynamic Status is set when the voltage is in between the values set in the Upper Threshold and Lower Threshold registers. The associated channel(s) bit is set to 1 and is non-latching.

Mid-Range Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Mid-Range Latched Status

Function: The Mid-Range Latched Status register is set when the voltage signal is in-between Upper and Lower thresholds set in the Upper Threshold and Lower Threshold registers.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Status is indicated (bit is set) within 500 µs (pending characterization). Write a 1 to clear status.

Mid-Range Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Mid-Range Interrupt Enable

Function: When enabled interrupts are generated for each channel when the Mid-Range Latched Status register senses the voltage signal is in-between Upper and Lower thresholds.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts

Mid-Range Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Mid-Range Set Edge/Level Interrupt

Function: Sets Mid-Range Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

Mid-Range Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Lo-Hi Transition Dynamic Status

Function: Senses Low to High transitions for each channel and provides real-time status.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: 1 is read when a rising edge transition is sensed. 0 indicates no status.

Notes: Considered “momentary” during the actual event when detected. Programmable for level or edge sensing, status is indicated (associated channel(s) bit set to 1) within 20 µs (pending characterization).

Lo-Hi Transition Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Lo-Hi Transition Latched Status

Function: The Lo-Hi Transition Latched Status register is set when it senses Low to High transitions for each channel.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: 1 is written when a rising edge transition is sensed. 0 indicates no status. Write a 1 to clear status.

Notes: Programmable for level or edge sensing, status is indicated (associated channel(s) bit set to 1) within 20 µs (pending characterization).

Lo-Hi Transition Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Lo-Hi Transition Interrupt Enable

Function: When enabled, interrupts are generated for each channel when the Lo-Hi Transition Latched Status register senses a Low to High transition for any channel.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts.

Lo-Hi Transition Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Lo-Hi Transition Set Edge/Level Interrupt

Function: Sets Lo-Hi Transition Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

Lo-Hi Transition Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Hi-Lo Transition Dynamic Status

Function: Senses High to Low transitions for each channel and provides real-time status.

Type: binary word (32-bit)

Read/Write: R

Initialized Value: 0

Operational Settings: 1 is read when a rising edge transition is sensed. 0 indicates no status.

Notes: Considered “momentary” during the actual event when detected. Programmable for level or edge sensing, status is indicated (associated channel(s) bit set to 1) within 20 µs (pending characterization).

Hi-Lo Transition Dynamic Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Hi-Lo Transition Latched Status

Function: The Hi-Lo Transition Latched Status register is set when it senses High to Low transitions for each channel.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: 1 is written when a falling edge transition is sensed. 0 indicates no status. Write a 1 to clear status.

Notes: Programmable for level or edge sensing, status is indicated (associated channel(s) bit set to 1) within 20 µs (pending characterization).

Hi-Lo Transition Latched Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Hi-Lo Transition Interrupt Enable

Function: When enabled, interrupts are generated for each channel when the Hi-Lo Transition Latched Status register senses a High to Low transition for any channel.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to enable interrupts. Write a 0 to disable interrupts.

Hi-Lo Transition Interrupt Enable

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Hi-Lo Transition Set Edge/Level Interrupt

Function: Sets Hi-Lo Transition Latched Status register to trigger on edge or level detection.

Type: binary word (32-bit)

Read/Write: R/W

Initialized Value: 0

Operational Settings: Program the desired status sensing (per channel); 0 = edge, 1 = level.

Hi-Lo Transition Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Enhanced Functionality

Input Modes

There are 10 Input modes. All input modes may be configured with debounce capability. Debounce capability allows configurable filtering of noisy signals and transients. Each channel may be set to an individual debounce time value. When a debounce time is set to a non-zero value, the signal reading after a transition must remain at the same level for the debounce interval before it is propagated through, otherwise it is rejected. All Input Modes (1-10) FIFO buffers are 1024 words deep.

Mode 0 – No Enhancement Mode: Behaves the same as a standard functionality only module.

Mode 1 – High Time Pulse Measurement (FIFO Buffer): Timing measurements record the time interval (in 10 µs ticks) from a pair of transitions.

Mode 2 – Low Time Pulse Measurement (FIFO Buffer): Timing measurements record the time interval (in 10 µs ticks) from a pair of transitions.

Mode 3 – Transition Timestamp of All Rising Edges (FIFO Buffer): Rising Edge time stamps from 100 kHz, 32-bit counter will be sequentially available and stored in the FIFO buffer.

Note: In this example, four counter values at the rising edge transitions are recorded to the FIFO: 0x344321, 0x344999, 0x345011, 0x345689, etc. Delta of 0x678 = 1656 counts, or 16.56 ms interval between pulses.

Mode 4 – Transition Timestamp of All Falling Edges (FIFO Buffer): Falling Edge time stamps from 100 kHz, 32-bit counter will be sequentially available and stored in the FIFO buffer.

Mode 5 – Transition Timestamp of All Edges (FIFO Buffer): Rising and Falling Edge time stamps from 100 kHz, 32-bit counter will be sequentially available and stored in the FIFO buffer.

Note: In this example, all edges time stamp. Four counter values at the transitions are recorded to the FIFO: 0x344321, 0x344999, 0x345011, 0x345689, etc. Delta of 0x33C = 828 counts, or 8.28 ms interval between pulses.

Mode 6 – Rising Edge Transition Counter: When selected, the rising edge count will be available from the count register at the FIFO read address. The counter is reset via user command. 32-bit count range to 232.

Mode 7 – Falling Edge Transition Counter: When selected, falling edge count will be available from the count register at the FIFO read address. The counter is reset via user command. 32-bit count range to 232

Mode 8 – Rising and Falling Edge Transition Counter: When selected, cumulative edge counts will be available from the count register at the FIFO read address. The counter is reset via user command. 32-bit count range to 232.

Mode 9 - Period Measurement: Timing measurements record the intervals from pulse-to-pulse in 10 µs ticks (delta timestamp).

Note: In Period Measurement mode, the same three pulse-to-pulse interval values as calculated in the timestamp measurement would be directly recorded to the FIFO.

Mode 10 - Frequency Measurement: Enables frequency measurement, which will be available and stored in the FIFO buffer. Frequency measurement correlates to/utilizes a programmable time interval, which is programmed in the Period register. Direct readout of frequency is available when the interval is set to one second.

Output Modes

There are three Output modes, which include a standard output mode, two PWM outputs and a Pattern Generator Output mode.

Mode 32 (0x20) – PWM Continuous Output Mode: In the sample shown below, each of the 24 channels has been set up with incrementing periods and pulse widths, running in continuous mode. Timing is asynchronous to each channel, but is very precise and with low jitter. In this mode, the configured PWM output is enabled and disabled with the Start Output/Measure Enable register.

Mode 33 (0x21) - PWM Burst: Repeats the pulse based on programmed Period and Pulse Width “n” times as programmed in the Number of Cycles register.

Mode 34 (0x22) – Pattern Generator Output: Outputs all mode selected channels based on the pattern programmed in the Pattern RAM register. The output rate is set in the Pattern RAM Period register. The output is a cyclic transmission of a 216 deep X 24 bit pattern array at configurable pattern intervals with 10 µs resolution. Pattern output may be stopped and resumed at the same point in the cycle. The following shows an arbitrary output of patterns as displayed on 24 channels of a logic analyzer. Each vertical column represents one 24-bit pattern of the 216 pattern array.

Mode Select

Function: This register provides selection of 13 different modes: Inputs 1-10; Outputs 32-34. See the following table for a brief description of each mode.

Type: binary word (32-bit)

Data Range: 1-10; 32-34

Read/Write: R/W

Initialized Value: 0

Operational Settings: Modes 0 through 10, 32, 33 and 34 are selectable for each channel. Writing a 0 will return that channel to normal operation.

Mode #

Hex

Description

1

0x0001

Measure “High” time: Write a 1 to the Start Output/Measure Enable register to enable measurement of the I/O state “High” time. It will not be measured if the bit is not set forthat channel, i.e. 0. If a 1 is written to enable measurement on a channel while that channel’s I/O state is 1, then the internal counter will begin to count upon begin enabled.

2

0x0002

Measure “Low” time: Write a 1 to the Start Output/Measure Enable register to enable measurement of the I/O state “Low time”. It will not be measured if the bit is not set for that channel. If a 1 is written to enable measurement on a channel while that channel’s I/O state is 0, then the internal counter will begin to count upon being enabled.

3

0x0003

Time-stamp of all rising edges: Write a 1 to the Start Output/Measure Enable register and the timestamp counter will begin to count. A low-to-high transition on that channel will store the timestamp at the time of the transition in the FIFO. If that channel is then disabled by writing a 0, the timestamp counter will pause and any low-to-high transitions of the I/O state will not trigger FIFO storage. Write any value to the Reset Timer register to reset the timestamp counter.

4

0x0004

Time-stamp of all falling edges: Write a 1 to the Start Output/Measure Enable register and the timestamp counter will begin to count. A high-to-low transition on that channel will store the timestamp at the time of the transition in the FIFO. If that channel is then disabled by writing a 0, the timestamp counter will pause and any high-to-low transitions of the I/O state will not trigger a FIFO storage. Write any value to the Reset Timer register to reset the timestamp counter.

5

0x0005

Time-stamp of all edges: Write a 1 to the Start Output/Measure Enable register and the timestamp counter will begin to count. Any low-to-high or high-to-low transition on that channel will store the timestamp at the time of the transition in the FIFO. If that channel is then disabled by writing a 0, the timestamp counter will pause and any lowto-high or high-to-low transitions of the I/O state will not trigger FIFO storage. Write any value to the Reset Timer register to reset the timestamp counter.

6

0x0006

Count total number of rising edges (until FIFO reset): Write a 1 to the Start Output/Measure Enable register to begin tracking any low-to-high transition of that channel’s I/O state will increment the counter by one. If a 0 is written in the register for that channel, the count will not increment on any transitions. Write any value to the Reset Timer register to reset the counter.

7

0x0007

Count total number of falling edges (until FIFO reset): Write a 1 to the Start Output/Measure Enable register to begin tracking any high-to-low transition of that channel’s I/O state will increment the counter by one. If a 0 is written in the register for that channel, the count will not increment on any transitions. Write any value to the Reset Timer register to reset the counter.

8

0x0008

Count total number of all edges (until FIFO reset): Write a 1 to the Start Output/Measure Enable register to begin tracking any low-to-high transition or high-tolow transition of that channel’s I/O state will increment the counter by one. If a 0 is written in the register for that channel, the count will not increment on any transitions. Write any value to the Reset Timer register to reset the counter.

Mode #

Hex

Description

1

0x0001

Measure “High” time: Write a 1 to the Start Output/Measure Enable register to enable measurement of the I/O state “High” time. It will not be measured if the bit is not set for that channel, i.e. 0. If a 1 is written to enable measurement on a channel while that channel’s I/O state is 1, then the internal counter will begin to count upon begin enabled.

2

0x0002

Measure “Low” time: Write a 1 to the Start Output/Measure Enable register to enable measurement of the I/O state “Low time”. It will not be measured if the bit is not set for that channel. If a 1 is written to enable measurement on a channel while that channel’s I/O state is 0, then the internal counter will begin to count upon being enabled.

3

0x0003

Time-stamp of all rising edges: Write a 1 to the Start Output/Measure Enable register and the timestamp counter will begin to count. A low-to-high transition on that channel will store the timestamp at the time of the transition in the FIFO. If that channel is then disabled by writing a 0, the timestamp counter will pause and any low-to-high transitions of the I/O state will not trigger FIFO storage. Write any value to the Reset Timer register to reset the timestamp counter

4

0x0004

Time-stamp of all falling edges: Write a 1 to the Start Output/Measure Enable register and the timestamp counter will begin to count. A high-to-low transition on that channel will store the timestamp at the time of the transition in the FIFO. If that channel is then disabled by writing a 0, the timestamp counter will pause and any high-to-low transitions of the I/O state will not trigger a FIFO storage. Write any value to the Reset Timer register to reset the timestamp counter.

5

0x0005

Time-stamp of all edges: Write a 1 to the Start Output/Measure Enable register and the timestamp counter will begin to count. Any low-to-high or high-to-low transition on that channel will store the timestamp at the time of the transition in the FIFO. If that channel is then disabled by writing a 0, the timestamp counter will pause and any lowto-high or high-to-low transitions of the I/O state will not trigger FIFO storage. Write any value to the Reset Timer register to reset the timestamp counter

6

0x0006

Count total number of rising edges (until FIFO reset): Write a 1 to the Start Output/Measure Enable register to begin tracking any low-to-high transition of that channel’s I/O state will increment the counter by one. If a 0 is written in the register for that channel, the count will not increment on any transitions. Write any value to the Reset Timer register to reset the counter.

7

0x0007

Count total number of falling edges (until FIFO reset): Write a 1 to the Start Output/Measure Enable register to begin tracking any high-to-low transition of that channel’s I/O state will increment the counter by one. If a 0 is written in the register for that channel, the count will not increment on any transitions. Write any value to the Reset Timer register to reset the counter.

8

0x0008

Count total number of all edges (until FIFO reset): Write a 1 to the Start Output/Measure Enable register to begin tracking any low-to-high transition or high-tolow transition of that channel’s I/O state will increment the counter by one. If a 0 is written in the register for that channel, the count will not increment on any transitions. Write any value to the Reset Timer register to reset the counter.

Mode #

Hex

Description

9

0x0009

Measure period from rising edge (L-H transition) to next rising edge: The first lowto-high transition of any enabled channel will start the counter. The next low-to-high transition will store the count in the FIFO, reset the counter, and begin the count again. This will repeat. After the waveform on the input has finished, write any value to the Reset Timer to reset it to zero.

10

0x000A

Measure frequency: The first low-to-high transition of any enabled channel will start the PWM Period counter. The counter will be incremented for every low-to-high transition that occurs within the defined period. Once the period counter reaches zero, the number of low-to-high transitions counted will be stored in FIFO and the process will restart. Write any value to the Reset Timer to reset it to zero.

32

0x20

PWM – output continuously: Will continuously (repeat) the pulse based on programmed Period and Pulse Width registers. Write a 1 to output the continuous waveform programed in the Period and Pulse Width registers. Write a 0 to disable the output.

33

0x21

PWM – output “n” times Will repeat the pulse based on programmed Period and Pulse Width “n” times as programmed in the Number of Cycles register. Write a 1 to output the number of pulses written in the Number of Cycles register with the period and pulse width written in the Period and Pulse Width registers. Once the programmed number of pulses that was written to the register has been outputted, a 0 will be written back to the register for the channel that was enabled (self-clearing).

34

0x22

Output pattern data held in RAM: Outputs all mode selected channel(s) based on the pattern programmed in RAM. The output rate is set in the Pattern RAM Period register. The Pattern RAM Start Address register will determine where the pattern RAM output will begin when enabled. The Pattern RAM End Address register will determine where the pattern RAM output will end when enabled. After the pattern is outputted, it will loop back to the start address. Writing a 0x1 to the control register will loop the pattern continuously. While looping continuously, a 0x0 can be written to stop the output and bring the pattern back to the start address or a 0x5 can be written to pause the output wherever it may be in the pattern. Writing a 0x1 when the pattern is paused will resume the pattern at the same spot. Writing a 0x3 to the control register will burst the pattern from the start address to the end address for N number of times. N is determined by the value written in the Pattern RAM Period register. The Pattern RAM Period register determines how long the each address data will be output for. In other words, it is the time it takes for the output to change to the next address.

Notes:

Input

Output

1

Mode(s) 1-10: FIFO storage occurs at 10 µs intervals (unless otherwise specified)

2

Mode(s) 7- 9: Applies to measurement “count” edges – the “count” is provided/updated at 8ns intervals in the first element of the FIFO only (no FIFO ‘storage” – first element is dynamically updated).

3

Mode 10 (Measure frequency): In this mode, the captured FIFO data is essentially the number of transitions measured within a given user specified time interval (specified/programmed in the Pulse Width register). From this, the user calculates frequency by [FIFO Data (# of transitions) / Pulse Width], or, simply program the Pulse Width register to a time interval of 1 second, which then FIFO Data (# of transitions) directly correlates to measured frequency (Hz).

Start Output/Measure Enable

Function: Output Modes: When the Mode Select register is programmed for PWM output modes (Modes 32 & 33), the Start Output/Measure Enable register is used to start the channel outputs. Input Modes: When the Mode Select register is programmed for input modes (Modes 1-10), the Start Output/Measure Enable register is used to start measurement.

Type: binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: The channel(s) output is based on the pattern preset in the programmed pulse characteristic registers: Period, Pulse Width and Output Polarity. If the Mode Select register is set to Mode 33, the number of pulses is controlled by the Number of Cycles register.

Reset Timer

Function: Resets Timer to default value.

Type: binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 FFFF

Read/Write: W

Initialized Value: 0

Operational Settings: Writing any value to this register resets the Timer to default value. Applicable to Modes 3 through 10. See Mode Select register.

Notes: Resetting timers will also retrigger the FIFO store mechanism to trigger or restart the FIFO on the next valid low-tohigh transition detected.

FIFO Operations/Functions

There is an independent FIFO (1024 32-bit words deep) for each channel allocated for use when the Mode Select register is programmed for the appropriate mode (applies to Modes 1-10).

Read FIFO/Read Count

Function: Depends upon Mode Select register setting. Read FIFO: Provides stored data dependent on the input channel(s) mode selected. Applicable to Modes 1 through 5, 9 and 10. See Mode Select register. Read Count: Applicable to Modes 6, 7 and 8. See Mode Select register.

Type: binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: 0

Operational Settings: The available data in the FIFO buffer can be retrieved, one word at a time (32-bits), from the identified memory/register address.

Note The Read FIFO and Read Count functions share a register. They are mutually exclusive in that depending upon the setting of the Mode Select register, either one or the other will become active.

Read FIFO Count

Function: Reads the number of 32-bit words stored in FIFO for each channel.

Type: binary word (32-bit)

Data Range: Any value

Read/Write: R/W

Initialized Value: 0

Operational Settings: Mode Select register set for Modes 1-10.

Read FIFO Status

Function: Provides a real-time status of the following conditions: • FIFO empty • FIFO full • Almost Empty • Almost Full

Type: binary word (32-bit)

Data Range: 0x0000 0000 to 0x4

Read/Write: R

Initialized Value: 0

Operational Settings: See table below.

Read FIFO Status

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Allocation

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

X

#W

Allocation

X

D

D=DATA BIT

D0 – Full

D1 – Almost Full

D2 – Almost Empty

D3 - Empty

Reset FIFO

Function: Resets measurement FIFO (only) to zero. Applicable to Modes 1 through 5, 9 and 10. See Mode Select register.

Type: binary word (32-bit)

Data Range: Any value

Read/Write: W

Initialized Value: 0

Operational Settings: The act of writing any value to this register will apply the reset.

PWM Operations/Functions

Unless otherwise specified, PWM operations and functions apply to channels when the Mode Select register is set for Modes 32 & 33.

Period

The Period register works in conjunction with the Pulse Width, Output Select, Number of Cycles and Start Output/Measure Enable registers to configure PWM output. See Configuring PWM Output figure below. It is also used for Period and Frequency measurement.

Configuring PWM Output

Function: When the Mode Select register is programmed for PWM output modes (Modes 32 & 33), the PWM Period is based on the programmed value set in this register.

Type: binary word (32-bit)

Data Range: 0x0000 0002 to 0xFFFF FFFE

Read/Write: R/W

Initialized Value: 0

Operational Settings: Mode Select register is set to Mode 32 or 33, the Period register is used to program the desired channel PWM output pulse period. Enter the desired PWM pulse period (LSB=@ 10 µs; valid entries are: 16 ns to 34.36 sec.).

Note: Programmed PWM Period must be greater than the value set in the Pulse Width register.

Pulse Width

Function: When the Mode Select register is programmed for PWM output modes (Modes 32 & 33), the Pulse Width register is used to program the desired channel(s) PWM Pulse Width “ON” time. See Configuring PWM Output figure. When the Mode Select register is programmed for frequency measurement (Mode 10), the Pulse Width register is used to program the Timebase for the desired channel(s).

Type: binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFE

Read/Write: R/W

Initialized Value: 0

Operational Settings:

Applied to Mode(s) 32 & 33: Enter the desired PWM Pulse Width (LSB=@ 10 µs; valid entries from 10 µs to @ 10 µs to 10 µs x 232 sec). Used in conjunction with the Period register.

Note: Programmed PWM Pulse Width must be less than the value set in the Period register.

Applied to Mode 10: For channel(s) with functions that rely on frequency measurement, the Pulse Width register is used to program the desired channel “Timebase” for the frequency measurement transition count period of time.

Note: There may be an initial “low” level output delay based on the Period time before the initial pulse is output. =Note: There may be an initial “low” level output delay based on the Period time before the initial pulse is output.

Number of Cycles

Function: When Mode Select register is programmed for Mode 33, the Number of Cycles register is used to program the number of times to repeat the pulse.

Type: binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Pulse is determined and used in conjunction with the Period and Pulse Width registers. Enter the desired Number of Cycles.

Note: If continuous pulse generation is desired, select Mode 32.

Pattern Generator Operations/Functions

Applies to channels set for Output mode 34 on the Mode Select register. There is an allocated RAM data pattern 64K deep RAM location range, bit-mapped per channel that can be used for multichannel pulse pattern generation. Each channel, when programmed for Mode 34, is bit-mapped (LSB = Ch1) and when triggered (timers are reset), will sequentially output the programmed RAM pattern at the rate programmed in the Pattern RAM Period register.

Pattern RAM Period

Function: Programs the desired channel output pattern rate.

Type: binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Enter the desired Pattern Generator RAM period (LSB=@ 10 µs).

Pattern RAM Start Address

Function: Programs the starting address for the Pattern Generator.

Type: binary word (32-bit)

Data Range: 0x40000 to 0x7FFFC

Read/Write: R/W

Initialized Value: 0

Operational Settings: Output rate is determined by the rate programmed in the Pattern RAM Period register. Write a “0x1” to start the RAM pattern output; write a “0x0” to stop the RAM pattern output.

Pattern RAM Start Address

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

24

23

22

21

20

19

18

17

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

16

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Pattern RAM Number of Cycles

Function: Program the number of times to repeat the pattern.

Type: binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Programmable from 1 to 232 cycles.

Pattern RAM Control

Function: Control the RAM data pattern.

Type: binary word (32-bit)

Data Range: N/A

Read/Write: W

Initialized Value: 0

Operational Settings: The Pattern RAM Start Address register determines where the pattern RAM output will begin when enabled. The Pattern RAM End Address register determines where the pattern RAM output will end when enabled. After the pattern at the pattern end address is outputted, it will loop back to the start address.

Pattern RAM Control

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

24

23

22

21

20

19

18

17

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

16

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

X

D

D=DATA BIT

Notes: Write the following values to the register to perform each function.

Bit Function

D0 Pattern Looping: This bit will enable or disable continuous pattern looping. Write 0x1 to enable and 0x0 to disable the pattern.

D1 Burst Mode: Write 0x3 will burst the pattern from the start address to the end address for N number of times. N is determined by the value written in the Pattern RAM Number of Cycles register.

D2 Pause: Write 0x5 to pause the pattern when enabled.

D3 Rising Edge External Trigger Enable: Uses Channel 1 as the input. Write 0xA to enable pattern burst on a rising edge.

D4 Falling Edge External Trigger Enable: Uses Channel 1 as the input. Write 0x12 to enable pattern burst on a falling edge.

Output Polarity

Function: When the Mode Select register is programmed for PWM output modes (Modes 32 & 33), the Output Polarity programs the PWM Pulse Period to start either High (0) or Low (1).

Type: binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 FFFF

Read/Write: R/W

Initialized Value: 0 Operational Settings: Applies to Modes 32 and 33. The Output Polarity register is used to program the start “level” (or state) of the PWM Pulse Period. The default is ON (High), which is set when the PWM Polarity bit is 0. The PWM start level channel(s) output will be High for the initial start of the period. See Configuring PWM Output figure. The time is defined by the Period and Pulse Width registers. The remainder of the PWM Period time will be “low” defined by the [PWM Period - PWM Pulse Width]. If the PWM Polarity bit is set to 1, the PWM start level will be “low” for the programmed PWM Pulse Width and the remainder of the PWM Period time will be “high” defined by the [PWM Period – PWM Pulse Width]. Bit mapped per channel.

Note: There may be an initial “low” level output delay based on the Period time before the initial pulse is output.

Output Polarity

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

FUNCTION

X

Channel

X

D=DATA BIT

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

FUNCTION

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Channel

D

D=DATA BIT

Function Register Map

0x1000

Switch Control

R/W

0x1004

Read I/O

R

0x1008

Overcurrent Reset

R/W

0x1010

Switch State

R

0x100C

Open Circuit Detection (*1)

R/W

0x2F00

Start Output/Measure Enable

R/W

0x2F04

Reset Timer

W

0x2F08

Reset FIFO

W

0x2F0C

Output Polarity

R/W

0x2F10

Pattern RAM Control

W

0x2F14

Pattern RAM Start Address

R/W

0x2F18

Pattern RAM End Address

R/W

0x2F1C

Pattern RAM Period

R/W

0x2F20

Pattern RAM Num of Cycles

R/W

0x2000

Voltage Reading (Sampled) Ch.1

R

0x2080

Voltage Reading (Sampled) Ch.2

R

0x2100

Voltage Reading (Sampled) Ch.3

R

0x2180

Voltage Reading (Sampled) Ch.4

R

0x2200

Voltage Reading (Sampled) Ch.5

R

0x2280

Voltage Reading (Sampled) Ch.6

R

0x2300

Voltage Reading (Sampled) Ch.7

R

0x2380

Voltage Reading (Sampled) Ch.8

R

0x2400

Voltage Reading (Sampled) Ch.9

R

0x2480

Voltage Reading (Sampled) Ch.10

R

0x2500

Voltage Reading (Sampled) Ch.11

R

0x2580

Voltage Reading (Sampled) Ch.12

R

0x2600

Voltage Reading (Sampled) Ch.13

R

0x2680

Voltage Reading (Sampled) Ch.14

R

0x2700

Voltage Reading (Sampled) Ch.15

R

0x2780

Voltage Reading (Sampled) Ch.16

R

0x2004

Voltage Reading (Averaged) Ch.1

R

0x2084 Voltage Reading (Averaged) Ch.2

R

0x2104 Voltage Reading (Averaged) Ch.3

R

0x2184 Voltage Reading (Averaged) Ch.4

R

0x2204 Voltage Reading (Averaged) Ch.5

R

0x2284 Voltage Reading (Averaged) Ch.6

R

0x2304 Voltage Reading (Averaged) Ch.7

R

0x2384 Voltage Reading (Averaged) Ch.8

R

0x2404 Voltage Reading (Averaged) Ch.9

R

0x2484 Voltage Reading (Averaged) Ch.10

R

0x2504 Voltage Reading (Averaged) Ch.11

R

0x2584 Voltage Reading (Averaged) Ch.12

R

0x2604 Voltage Reading (Averaged) Ch.13

R

0x2684 Voltage Reading (Averaged) Ch.14

R

0x2704 Voltage Reading (Averaged) Ch.15

R

0x2784 Voltage Reading (Averaged) Ch.16

R

0x 2008

Current Reading (Sampled) Ch.1

R

0x 2088

Current Reading (Sampled) Ch.2

R

0x 2108

Current Reading (Sampled) Ch.3

R

0x 2188

Current Reading (Sampled) Ch.4

R

0x 2208

Current Reading (Sampled) Ch.5

R

0x 2288

Current Reading (Sampled) Ch.6

R

0x 2308

Current Reading (Sampled) Ch.7

R

0x 2388

Current Reading (Sampled) Ch.8

R

0x 2408

Current Reading (Sampled) Ch.9

R

0x 2C88

Current Reading (Sampled) Ch.10

R

0x 2508

Current Reading (Sampled) Ch.11

R

0x 2588

Current Reading (Sampled) Ch.12

R

0x 2608

Current Reading (Sampled) Ch.13

R

0x 2688

Current Reading (Sampled) Ch.14

R

0x 2708

Current Reading (Sampled) Ch.15

R

0x 2788

Current Reading (Sampled) Ch.16

R

0x 200C

Current Reading (Averaged) Ch.1

R

0x 208C

Current Reading (Averaged) Ch.2

R

0x 210C

Current Reading (Averaged) Ch.3

R

0x 218C

Current Reading (Averaged) Ch.4

R

0x 220C

Current Reading (Averaged) Ch.5

R

0x 228C

Current Reading (Averaged) Ch.6

R

0x 230C

Current Reading (Averaged) Ch.7

R

0x 238C

Current Reading (Averaged) Ch.8

R

0x 240C

Current Reading (Averaged) Ch.9

R

0x 248C

Current Reading (Averaged) Ch.10

R

0x 250C

Current Reading (Averaged) Ch.11

R

0x 258C

Current Reading (Averaged) Ch.12

R

0x 260C

Current Reading (Averaged) Ch.13

R

0x 268C

Current Reading (Averaged) Ch.14

R

0x 270C

Current Reading (Averaged) Ch.15

R

0x 278C

Current Reading (Averaged) Ch.16

R

0x2010

Debounce Time Ch.1

R/W

0x2090

Debounce Time Ch.2

R/W

0x2110

Debounce Time Ch.3

R/W

0x2190

Debounce Time Ch.4

R/W

0x2210

Debounce Time Ch.5

R/W

0x2290

Debounce Time Ch.6

R/W

0x2310

Debounce Time Ch.7

R/W

0x2390

Debounce Time Ch.8

R/W

0x2410

Debounce Time Ch.9

R/W

0x2C90

Debounce Time Ch.10

R/W

0x2510

Debounce Time Ch.11

R/W

0x2590

Debounce Time Ch.12

R/W

0x2610

Debounce Time Ch.13

R/W

0x2690

Debounce Time Ch.14

R/W

0x2710

Debounce Time Ch.15

R/W

0x2790

Debounce Time Ch.16

R/W

0x2014

Max. High Threshold Ch.1

R/W

0x2094

Max. High Threshold Ch.2

R/W

0x2114

Max. High Threshold Ch.3

R/W

0x2194

Max. High Threshold Ch.4

R/W

0x2214

Max. High Threshold Ch.5

R/W

0x2294

Max. High Threshold Ch.6

R/W

0x2314

Max. High Threshold Ch.7

R/W

0x2394

Max. High Threshold Ch.8

R/W

0x2414

Max. High Threshold Ch.9

R/W

0x2494

Max. High Threshold Ch.10

R/W

0x2514

Max. High Threshold Ch.11

R/W

0x2594

Max. High Threshold Ch.12

R/W

0x2614

Max. High Threshold Ch.13

R/W

0x2694

Max. High Threshold Ch.14

R/W

0x2714

Max. High Threshold Ch.15

R/W

0x2794

Max. High Threshold Ch.16

R/W

0x2018

Upper Threshold Ch.1

R/W

0x2098

Upper Threshold Ch.2

R/W

0x2118

Upper Threshold Ch.3

R/W

0x2198

Upper Threshold Ch.4

R/W

0x2218

Upper Threshold Ch.5

R/W

0x2298

Upper Threshold Ch.6

R/W

0x2318

Upper Threshold Ch.7

R/W

0x2398

Upper Threshold Ch.8

R/W

0x2418

Upper Threshold Ch.9

R/W

0x2C98

Upper Threshold Ch.10

R/W

0x2518

Upper Threshold Ch.11

R/W

0x2598

Upper Threshold Ch.12

R/W

0x2618

Upper Threshold Ch.13

R/W

0x2698

Upper Threshold Ch.14

R/W

0x2718

Upper Threshold Ch.15

R/W

0x2798

Upper Threshold Ch.16

R/W

0x201C

Lower Threshold Ch.1

R/W

0x209C

Lower Threshold Ch.2

R/W

0x211C

Lower Threshold Ch.3

R/W

0x219C

Lower Threshold Ch.4

R/W

0x221C

Lower Threshold Ch.5

R/W

0x229C

Lower Threshold Ch.6

R/W

0x231C

Lower Threshold Ch.7

R/W

0x239C

Lower Threshold Ch.8

R/W

0x241C

Lower Threshold Ch.9

R/W

0x249C

Lower Threshold Ch.10

R/W

0x251C

Lower Threshold Ch.11

R/W

0x259C

Lower Threshold Ch.12

R/W

0x261C

Lower Threshold Ch.13

R/W

0x269C

Lower Threshold Ch.14

R/W

0x271C

Lower Threshold Ch.15

R/W

0x279C

Lower Threshold Ch.16

R/W

0x2020

Min. Low Threshold Ch.1

R/W

0x20A0

Min. Low Threshold Ch.2

R/W

0x2120

Min. Low Threshold Ch.3

R/W

0x21A0

Min. Low Threshold Ch.4

R/W

0x2220

Min. Low Threshold Ch.5

R/W

0x22A0

Min. Low Threshold Ch.6

R/W

0x2320

Min. Low Threshold Ch.7

R/W

0x23A0

Min. Low Threshold Ch.8

R/W

0x2420

Min. Low Threshold Ch.9

R/W

0x2CA0

Min. Low Threshold Ch.10

R/W

0x2520

Min. Low Threshold Ch.11

R/W

0x25A0

Min. Low Threshold Ch.12

R/W

0x2620

Min. Low Threshold Ch.13

R/W

0x26A0

Min. Low Threshold Ch.14

R/W

0x2720

Min. Low Threshold Ch.15

R/W

0x27A0

Min. Low Threshold Ch.16

R/W

0x2024

Overcurrent Value Ch.1

R/W

0x20A4

Overcurrent Value Ch.2

R/W

0x2124

Overcurrent Value Ch.3

R/W

0x21A4

Overcurrent Value Ch.4

R/W

0x2224

Overcurrent Value Ch.5

R/W

0x22A4

Overcurrent Value Ch.6

R/W

0x2324

Overcurrent Value Ch.7

R/W

0x23A4

Overcurrent Value Ch.8

R/W

0x2424

Overcurrent Value Ch.9

R/W

0x2CA4

Overcurrent Value Ch.10

R/W

0x2524

Overcurrent Value Ch.11

R/W

0x25A4

Overcurrent Value Ch.12

R/W

0x2624

Overcurrent Value Ch.13

R/W

0x26A4

Overcurrent Value Ch.14

R/W

0x2724

Overcurrent Value Ch.15

R/W

0x27A4

Overcurrent Value Ch.16

R/W

0x3000

Read FIFO/Read Count Ch.1

R

0x3080

Read FIFO/Read Count Ch.2

R

0x3100

Read FIFO/Read Count Ch.3

R

0x3180

Read FIFO/Read Count Ch.4

R

0x3200

Read FIFO/Read Count Ch.5

R

0x3280

Read FIFO/Read Count Ch.6

R

0x3300

Read FIFO/Read Count Ch.7

R

0x3380

Read FIFO/Read Count Ch.8

R

0x3400

Read FIFO/Read Count Ch.9

R

0x3480

Read FIFO/Read Count Ch.10

R

0x3500

Read FIFO/Read Count Ch.11

R

0x3580

Read FIFO/Read Count Ch.12

R

0x3600

Read FIFO/Read Count Ch.13

R

0x3680

Read FIFO/Read Count Ch.14

R

0x3700

Read FIFO/Read Count Ch.15

R

0x3780

Read FIFO/Read Count Ch.16

R

0x3004

Read FIFO Count Ch.1

R

0x3084

Read FIFO Count Ch.2

R

0x3104

Read FIFO Count Ch.3

R

0x3184

Read FIFO Count Ch.4

R

0x3204

Read FIFO Count Ch.5

R

0x3284

Read FIFO Count Ch.6

R

0x3304

Read FIFO Count Ch.7

R

0x3384

Read FIFO Count Ch.8

R

0x3404

Read FIFO Count Ch.9

R

0x3484

Read FIFO Count Ch.10

R

0x3504

Read FIFO Count Ch.11

R

0x3584

Read FIFO Count Ch.12

R

0x3604

Read FIFO Count Ch.13

R

0x3684

Read FIFO Count Ch.14

R

0x3704

Read FIFO Count Ch.15

R

0x3784

Read FIFO Count Ch.16

R

0x3008

Read FIFO Status Ch.1

R

0x3088

Read FIFO Status Ch.2

R

0x3108

Read FIFO Status Ch.3

R

0x3188

Read FIFO Status Ch.4

R

0x3208

Read FIFO Status Ch.5

R

0x3288

Read FIFO Status Ch.6

R

0x3308

Read FIFO Status Ch.7

R

0x3388

Read FIFO Status Ch.8

R

0x3408

Read FIFO Status Ch.9

R

0x3488

Read FIFO Status Ch.10

R

0x3508

Read FIFO Status Ch.11

R

0x3588

Read FIFO Status Ch.12

R

0x3608

Read FIFO Status Ch.13

R

0x3688

Read FIFO Status Ch.14

R

0x3708

Read FIFO Status Ch.15

R

0x3788

Read FIFO Status Ch.16

R

0x300C

Mode Ch.1

R/W

0x308C

Mode Ch.2

R/W

0x310C

Mode Ch.3

R/W

0x318C

Mode Ch.4

R/W

0x320C

Mode Ch.5

R/W

0x328C

Mode Ch.6

R/W

0x330C

Mode Ch.7

R/W

0x338C

Mode Ch.8

R/W

0x340C

Mode Ch.9

R/W

0x348C

Mode Ch.10

R/W

0x350C

Mode Ch.11

R/W

0x358C

Mode Ch.12

R/W

0x360C

Mode Ch.13

R/W

0x368C

Mode Ch.14

R/W

0x370C

Mode Ch.15

R/W

0x378C

Mode Ch.16

R/W

0x3010

Pulse Width Ch.1

R/W

0x3090

Pulse Width Ch.2

R/W

0x3110

Pulse Width Ch.3

R/W

0x3190

Pulse Width Ch.4

R/W

0x3210

Pulse Width Ch.5

R/W

0x3290

Pulse Width Ch.6

R/W

0x3310

Pulse Width Ch.7

R/W

0x3390

Pulse Width Ch.8

R/W

0x3410

Pulse Width Ch.9

R/W

0x3490

Pulse Width Ch.10

R/W

0x3510

Pulse Width Ch.11

R/W

0x3590

Pulse Width Ch.12

R/W

0x3610

Pulse Width Ch.13

R/W

0x3690

Pulse Width Ch.14

R/W

0x3710

Pulse Width Ch.15

R/W

0x3790

Pulse Width Ch.16

R/W

0x3014

Period Ch.1

R/W

0x3094

Period Ch.2

R/W

0x3114

Period Ch.3

R/W

0x3194

Period Ch.4

R/W

0x3214

Period Ch.5

R/W

0x3294

Period Ch.6

R/W

0x3314

Period Ch.7

R/W

0x3394

Period Ch.8

R/W

0x3414

Period Ch.9

R/W

0x3494

Period Ch.10

R/W

0x3514

Period Ch.11

R/W

0x3594

Period Ch.12

R/W

0x3614

Period Ch.13

R/W

0x3694

Period Ch.14

R/W

0x3714

Period Ch.15

R/W

0x3794

Period Ch.16

R/W

0x3018

Number of Cycles Ch.1

R/W

0x3098

Number of Cycles Ch.2

R/W

0x3118

Number of Cycles Ch.3

R/W

0x3198

Number of Cycles Ch.4

R/W

0x3218

Number of Cycles Ch.5

R/W

0x3298

Number of Cycles Ch.6

R/W

0x3318

Number of Cycles Ch.7

R/W

0x3398

Number of Cycles Ch.8

R/W

0x3418

Number of Cycles Ch.9

R/W

0x3498

Number of Cycles Ch.10

R/W

0x3518

Number of Cycles Ch.11

R/W

0x3598

Number of Cycles Ch.12

R/W

0x3618

Number of Cycles Ch.13

R/W

0x3698

Number of Cycles Ch.14

R/W

0x3718

Number of Cycles Ch.15

R/W

0x3798

Number of Cycles Ch.16

R/W

BIT

0x0800

BIT Dynamic Status

R

0x0804

BIT Latched Status

R/W

0x0808

BIT Interrupt Enable

R/W

0x080C

BIT Set Edge/Level Interrupt

R/W

Overcurrent

0x0810

Overcurrent Dynamic Status

R

0x0814

Overcurrent Latched Status

R/W

0x0818

Overcurrent Interrupt Enable

R/W

0x081C

Overcurrent Set Edge/Level Interrupt

R/W

Threshold

0x0820

Max. Hi Threshold Dynamic Status

R

0x0824

Max. Hi Threshold Latched Status

R/W

0x0828

Max. Hi Threshold Interrupt Enable

R/W

0x082C

Max. Hi Threshold Set Edge/Level Interrupt

R/W

0x0830

Min. Lo Threshold Dynamic Status

R

0x0834

Min. Lo Threshold Latched Status

R/W

0x0838

Min. Lo Threshold Interrupt Enable

R/W

0x083C

Min. Lo Threshold Set Edge/Level Interrupt

R/W

Mid-Range

0x0840

Mid-Range Dynamic Status

R

0x0844

Mid-Range Latched Status

R/W

0x0848

Mid-Range Interrupt Enable

R/W

0x084C

Mid-Range Set Edge/Level Interrupt

R/W

Transition

0x0850

Low-High Transition Dynamic Status

R

0x0854

Low-High Transition Latched Status

R/W

0x0858

Low-High Transition Interrupt Enable

R/W

0x085C

Low-High Transition Set Edge/Level Interrupt

R/W

0x0860

High-Low Transition Dynamic Status

R

0x0864

High-Low Transition Latched Status

R/W

0x0868

High-Low Transition Interrupt Enable

R/W

0x086C

High-Low Transition Set Edge/Level Interrupt

R/W

NAI Cares

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Revision History

Revision

Revision Date

Description

Author

A

7/10/2019

Initial release

GC

A1

5/06/2020

ECO C07548: Module manuals updated for formatting consistency. No technical or specification updates.

MC

1 Enhanced Input/Output Functionality Capability

The Enhanced Input/Output Functionality Capability is available on the following modules:

Differential Transceiver Modules
```
o DF2 – 16 Channels Differential I/O
```

Discrete I/O Modules

o DT4 – 24 Channels, Programmable for either input or output, output up to 500 mA per channelfrom an applied external 3 – 60 VCC source.

o DT5 – 16 Channels, Programmable for either input voltage measurements (±80 V) or as a bidirectional current switch (up to 500 mA per channel).

o DT6 – 4 Channels, Programmable for either input voltage measurements (±100 V) or as a bidirectional current switch (up to 3 A per channel).

TTL/CMOS Modules

o TL2, TL4, TL6 and TL8 – 24 Channels, Programmable for either input or output.

2 Principle of Operation

The modules listed in section 1 provide enhanced input and output mode functionality. For incoming signals (inputs), the enhanced modes include Pulse, Frequency and Period measurements. For outputs, the enhanced modes include PWM (Pulse Width Modulation) and Pattern Generation.

2.1 Input Modes

All input modes may be configured with debounce capability. Debounce capability allows configurable filtering of noisy signals and transients. Each channel may be set to an individual debounce time value. When a debounce time is set to a non-zero value, the signal reading after a transition must remain at the same level for the debounce interval before it is propagated through, otherwise it is rejected.

The waveform shown in Figure 1 will be used to illustrate the behavior for each input mode.

2.1.1 Pulse Measurements

There are two Pulse Measurements features available – High Time Pulse Measurements and Low Time Pulse Measurements. The Pulse Measurement data is stored in the FIFO Buffer.

2.1.1.1 High Time Pulse Measurements

In this input mode, the data in the FIFO buffer is the measurement for each rising transition to the next falling one. Timing measurements record the time interval (in 10 µs ticks) from a pair of transitions.

For this example, the FIFO Word Count register will be set to 3 and the FIFO Buffer Data register will contain the following three values (counts of 10 µs): 1. 1500 (0x0000 05DC) 2. 2500 (0x0000 09C4) 3. 1000 (0x0000 03E8)

Time Interval

Calculations

High Time Pulse Measurements

1

1500 counts * 10 µsec = 15000 µsec = 15.0 msec

15.0 msec

2

2500 counts * 10 µsec = 25000 µsec = 25.0 msec

25.0 msec

3

1000 counts * 10 µsec = 10000 µsec = 10.0 msec

10.0 msec

2.1.1.2 Low Time Pulse Measurements

In this mode, the data in the FIFO buffer is the measurement for each falling edge to the next rising edge. Timing measurements record the time interval (in 10 µs ticks) from a pair of transitions.

For this example, the FIFO Word Count register will be set to 3 and the FIFO Buffer Data register will contain the following three values (counts of 10 µs): 1. 2000 (0x0000 07D0) 2. 500 (0x0000 01F4) 3. 1500 (0x0000 05DC)

Time Interval

Calculations

Low Time Pulse Measurements

1

2000 counts * 10 µsec = 20000 µsec = 20.0 msec

20.0 msec

2

500 counts * 10 µsec = 5000 µsec = 5.0 msec

5.0 msec

3

1500 counts * 10 µsec = 15000 µsec = 15.0 msec

15.0 msec

2.1.2 Transition Timestamps

There are three Transition Timestamp Measurements features available – Transition Timestamp for All Rising Edges, Transition Timestamp for All Falling Edges, and Transition Timestamp for All Edges. The Transition Timestamps Measurement data are store in the FIFO Buffer.

2.1.2.1 Transition Timestamp of All Rising Edges

In this mode, the data in the FIFO buffer is the Rising Edge Timestamp. The timestamp is a 32-bit counter that is incremented at the rate of 100 kHz (in other words, counter is incremented every 10 µsec). The timestamp is can be reset by the application at any time.

For this example, the FIFO Word Count register will be set to 4 and the FIFO Buffer Data register will contain the following four values (counts of 10 µs): 1. 1000 (0x0000 03E8) 2. 4500 (0x0000 1194) 3. 7500 (0x0000 1D4C) 4. 10000 (0x000 2710)

This data can be interpreted as follows:

Time Interval

Calculations

Time between rising edges

1 to 2

4500 – 1000 = 3500 counts = 3500 * 10 µsec = 35000 µsec = 35.0 msec

35.0 msec

2 to 3

7500 – 4500 = 3000 counts = 3000 * 10 µsec = 30000 µsec = 30.0 msec

30.0 msec

3 to 4

10000 – 7500 = 2500 counts = 2500 * 10 µsec = 25000 µsec = 25.0 msec

25.0 msec

2.1.2.2 Transition Timestamp of All Falling Edges

In this mode, the data in the FIFO buffer is the Falling Edge Timestamp. The timestamp is a 32-bit counter that is incremented at the rate of 100 kHz (in other words, counter is incremented every 10 µsec). The timestamp is can be reset by the application at any time.

For this example, the FIFO Word Count register will be set to 3 and the FIFO Buffer Data register will contain the following three values (counts of 10 µs): 1. 2500 (0x0000 09C4) 2. 7000 (0x0000 1B58) 3. 8500 (0x0000 2134)

This data can be interpreted as follows:

Time Interval

Calculations

Time between falling edges

1 to 2

7000 – 2500 = 4500 counts = 4500 * 10 µsec = 45000 µsec = 45.0 msec

45.0 msec

2 to 3

8500 – 7000 = 1500 counts = 1500 * 10 µsec = 15000 µsec = 15.0 msec

15.0 msec

2.1.2.3 Transition Timestamp of All Edges

In this mode, the data in the FIFO buffer is the Rising and Falling Edge Timestamp. The timestamp is a 32-bit counter that is incremented at the rate of 100 kHz (in other words, counter is incremented every 10 µsec). The timestamp is can be reset by the application at any time.

For this example, the FIFO Word Count register will be set to 7 and the FIFO Buffer Data register will contain the following seven values (counts of 10 µs): 1. 1000 (0x0000 03E8) 2. 2500 (0x0000 09C4) 3. 4500 (0x0000 1194) 4. 7000 (0x0000 1B58) 5. 7500 (0x0000 1D4C) 6. 8500 (0x0000 2134) 7. 10000 (0x000 2710)

This data can be interpreted as follows:

Time Interval

Calculations

Time between edges

1 to 2

2500 – 1000 = 1500 counts = 1500 * 10 µsec = 15000 µsec = 15.0 msec

15.0 msec

2 to 3

4500 – 2500 = 2000 counts = 2000 * 10 µsec = 20000 µsec = 20.0 msec

20.0 msec

3 to 4

7000 – 4500 = 2500 counts = 2500 * 10 µsec = 25000 µsec = 25.0 msec

25.0 msec

4 to 5

7500 – 7000 = 500 counts = 500 * 10 µsec = 5000 µsec = 5.0 msec

5.0 msec

5 to 6

8500 – 7500 = 1000 counts = 1000 * 10 µsec = 10000 µsec = 10.0 msec

10.0 msec

6 to 7

10000 – 8500 = 1500 counts = 1500 * 10 µsec = 15000 µsec = 15.0 msec

15.0 msec

2.1.3 Transition Counter

There are three Transition Counter features available – Rising Edge Transition Counter, Falling Edge Transition Counter and All Edge Transition Counter.

2.1.3.1 Rising Edges Transition Counter

In this mode, the count of the number of Rising Edges is recorded. The counter is a 32-bit counter. The counter is can be reset by the application at any time.

For this example, the Transition Count register will be set to 4.

2.1.3.2 Falling Edges Transition Counter

In this mode, the count of the number of Falling Edges is recorded. The counter is a 32-bit counter. The counter is can be reset by the application at any time.

For this example, the Transition Count register will be set to 3.

2.1.3.3 All Edges Transition Counter

In this mode, the count of the number of Rising and Falling Edges is recorded. The counter is a 32-bit counter. The counter is can be reset by the application at any time.

For this example, the Transition Count register will be set to 7.

2.1.4 Period Measurement

In this input mode, the data in the FIFO buffer is the measurement for each rising edge transition to the next rising edge transition. Timing measurements record the time interval (in 10 µs ticks).

For this example, the FIFO Word Count register will be set to 4 and the FIFO Buffer Data register will contain the following three values (counts of 10 µs): 1. 2000 (0x0000 07D0) 2. 2000 (0x0000 07D0) 3. 2000 (0x0000 07D0) 4. 2000 (0x0000 07D0)

Time Interval

Calculations

Period Measurements

1

2000 counts * 10 µsec = 20000 µsec = 20.0 msec

20.0 msec

2

2000 counts * 10 µsec = 20000 µsec = 20.0 msec

20.0 msec

3

2000 counts * 10 µsec = 20000 µsec = 20.0 msec

20.0 msec

4

2000 counts * 10 µsec = 20000 µsec = 20.0 msec

20.0 msec

2.1.5 Frequency Measurement

In this input mode, the data in the FIFO buffer is the number of rising edge transitions for the programmable time interval programmed in the Frequency Measurement Period register.

For this example, set the Frequency Measurement Period register = 4000 (4000 * 10 µs = 40000 µs = 40 msec).

For this example, the FIFO Word Count register will be set to 3 and the FIFO Buffer Data register will contain the following three values (number of rising edges: 1. 2 (0x0000 0002) 2. 2 (0x0000 0002) 3. 2 (0x0000 0002)

Time Interval

Calculations

Frequency Measurements

1

2 counts/40 msec = 2 counts/0.04 seconds = 50 Hz

50 Hz

2

2 counts/40 msec = 2 counts/0.04 seconds = 50 Hz

50 Hz

3

2 counts/40 msec = 2 counts/0.04 seconds = 50 Hz

50 Hz

2.2 Output Modes

There are three Enhanced Output Functionality modes: two PWM outputs and one Pattern Generator Output mode.

2.2.1 PWM Output

There are two PWM output modes, PWM Continuous and PWM Burst. The PWM timing is very precise with low jitter. In PWM Output mode, the Mode Select register is set to either “PWM Continuous or PWM Burst”. The value written to the PWM Period register specifies the period to output the PWM signal, the value written to the PWM Pulse Width register specifies the time for the “ON” state, and the value written to the PWM Output Polarity register specifies the initial edge of the output. For PWM Burst mode, the PWM Number of Cycles register specifies the number of cycles to output the signal. Note, there may be an initial “OFF” state level delay based on the Period time before the initial pulse is output.

2.2.1.1 PWM Continuous

Figure 12 and Figure 13 illustrate the PWM Continuous Output signal, one configured with PWM Output Polarity = Positive (0) and one configured with PWM Output Polarity = Negative (1). The configured PWM output is enabled and disabled with the Enable Measurements/Outputs register.

2.2.1.2 PWM Burst

Figure 14 and Figure 15 illustrate the PWM Burst Output signal with the PWM Number of Cycles = 5 pulses, one configured with PWM Output Polarity = Positive (0) and one configured with PWM Output Polarity = Negative (1). The configured PWM output is enabled with the Enable Measurements/Outputs register. Once the number of pulses that were requested is outputted, the value in the Enable Measurements/Outputs register will be reset (self-clearing) to allow for the output to be re-enabled

2.2.2 Pattern Generator

For the Pattern Generator mode, there is 64K block of unsigned 32-bit words allocated to specify the data pattern for the output channels. The data in each 32-bit word is bit-mapped per channel. The Pattern RAM Start Address and Pattern RAM End Address registers specify the starting and ending address in the 64K block to use as the data to output for each channel configured for Pattern Generator mode. The Pattern RAM Period register specifies the pattern rate. The Pattern RAM Control and Pattern RAM Number of Cycles control the Pattern Generator output – Continuous, Burst with a specified number of cycles, Pause, or External Trigger from input from Channel 1. Note, when any channel is configured for External Trigger Pattern Generator mode, Channel 1 must be set as an input.

Figure 16 illustrates the output of the 24 channels for the DT4 module all configured in Pattern Generator mode.

3 Register Descriptions

The register descriptions provide the register name, Type, Data Range, Read or Write information, Initialized Value, and a description of the function.

3.1 Enhanced I/O Functionality Registers

The modules listed in section 1 provide enhanced input and output mode functionality. The Mode Select and Enable Output/Measurement registers are general control registers for the different enhanced input and output modes.

3.1.1 Mode Select

Function: Configures the Enhanced Functionality Modes to apply to the channel.

Type: unsigned binary word (32-bit)

Data Range: See table

Read/Write: R/W

Initialized Value: 0

Operational Settings: It is important that the channel is correctly configured to either input or output in the Input/Output Format registers to correspond to the Enhanced Functionality Mode selected. Setting a 0 to this register will configure that channel to normal operation.

Mode Select Value (Decimal)

Mode Select Value (Hexadecimal)

Description

0

0x0000 0000

Enhanced Functionality Disabled

-

Input Enhanced Functionality Mode

1

0x0000 0001

High Time Pulse Measurements

2

0x0000 0002

Low Time Pulse Measurements

3

0x0000 0003

Transition Timestamp of All Rising Edges

4

0x0000 0004

Transition Timestamp of All Falling Edges

5

0x0000 0005

Transition Timestamp of All Edges

6

0x0000 0006

Rising Edges Transition Counter

7

0x0000 0007

Falling Edges Transition Counter

8

0x0000 0008

All Edges Transition Counter

9

0x0000 0009

Period Measurement

10

0x0000 000A

Frequency Measurement

-

Output Enhanced Functionality Mode

32

0x0000 0020

PWM Continuous

33

0x0000 0021

PWM Burst

34

0x0000 0022

Pattern Generator

3.1.2 Enable Measurements/Outputs

Function: Enables/starts the measurements or outputs based on the Mode Select for the channel.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x00FF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Setting the bit for the associated channel to a “1” will start the measurement or output depending on the Mode Select configuration for that channel. Setting the bit for the associated channel to “0” will stop the measurements/outputs.

Enable Measurements/Outputs

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

Ch24

Ch23

Ch22

Ch21

Ch20

Ch19

Ch18

Ch17

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Ch16

Ch15

Ch14

Ch13

Ch12

Ch11

Ch10

Ch9

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

3.1.3 Input Modes Registers

After configuring the Mode Select register, write a “1” to the Reset Timer/Counter register resets the channel’s timestamp and counter used for input modes. Write a “1” to the Enable Measurements/Outputs register to begin the measurement of the input signal. Write a “0” to the Enable Measurements/Outputs register to stop the measurement of the input signal. The data can be read either while the measurements are being made on input signals or after stopping the measurements.

3.1.3.1 Reset Timer/Counter

Function: Resets the measurement timestamp and counter for the channel.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x00FF FFFF

Read/Write: W

Initialized Value: 0

Operational Settings: Setting the bit for the associated channel to a “1” will: • reset the timestamp used for the Pulse Measurements mode (1-2), Transition Timestamp mode (3-5), and Period Measurement mode (9) and Frequency Measurement mode (10) • reset the counter used for Transition Counter mode (6-8)

Reset Timer/Counter

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

Ch24

Ch23

Ch22

Ch21

Ch20

Ch19

Ch18

Ch17

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Ch16

Ch15

Ch14

Ch13

Ch12

Ch11

Ch10

Ch9

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

3.1.3.2 FIFO Registers

The FIFO registers are used for the following input modes:

Pulse Measurements mode (1-2)
Transition Timestamp mode (3-5)
Period Measurement mode (9)
Frequency Measurement mode (10)

3.1.3.2.1 FIFO Buffer Data

Function: The data stored in the FIFO Buffer Data is dependent on the input mode.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: N/A

Operational Settings: Refer to examples in section 2.1.

3.1.3.2.2 FIFO Word Count

Function: This is a counter that reports the number of 32-bit words stored in the FIFO buffer.

Type: unsigned binary word (32-bit)

Data Range: 0 – 255 (0x0000 0000 to 0x0000 00FF)

Read/Write: R

Initialized Value: 0

Operational Settings: Every time a read operation is made from the FIFO Buffer Data register, the value in the FIFO Word Count register will be decremented by one. The maximum number of words that can be stored in the FIFO is 255.

FIFO Word Count

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

0

D

3.1.3.2.3 Clear FIFO

Function: Clears FIFO by resetting the FIFO Word Count register.

Type: unsigned binary word (32-bit)

Data Range: 0 or 1

Read/Write: W

Initialized Value: N/A

Operational Settings: Write a 1 to resets the Words in FIFO to zero; Clear FIFO register does not clear data in the buffer. A read to the buffer data will give “aged” data.

D31-D1

Reserved. Set to 0

D0

Set to 1 to reset the FIFO Word Count value to zero.

Clear FIFO

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	D

3.1.3.2.4 FIFO Status

Function: Sets the corresponding bit associated with the FIFO status type; there is a separate register for each channel.

Type: unsigned binary word (32-bit)

Data Range: See table

Read/Write: R

Initialized Value: 0

Description

D31-D4

Reserved

Set to 0

D3

Empty

Set to 1 when FIFO Word Count = 0

D2

Almost Empty

Set to 1 when FIFO Word Count ⇐ 63 (25%)

D1

Almost Full

Set to 1 when FIFO Word Count >= 191 (75%)

D0

Full

Set to 1 when FIFO Word Count = 255

FIFO Status

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	D	D	D	D

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

Ch24

Ch23

Ch22

Ch21

Ch20

Ch19

Ch18

Ch17

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Ch16

Ch15

Ch14

Ch13

Ch12

Ch11

Ch10

Ch9

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

3.1.4.1.4 PWM Number of Cycles

Function: When the Mode Select register is programmed for PWM Burst mode (33), the value in the PWM Number of Cycles is used to specify the number of times to repeat the PWM output signal.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Set the number of times to output the PWM signal. Refer to examples in section 2.2.1.

3.1.4.2 Pattern Generator Registers

The Pattern RAM registers are a 64K block of unsigned 32-bit words allocated to specify the data pattern for the output channels. The Pattern RAM Start Address, Pattern RAM End Address, Pattern RAM Period and Pattern RAM Control registers configure the Pattern Generator output signals. When the Pattern RAM Control register is configured for Burst, the Pattern RAM Number of Cycles specify the number of cycles to repeat the pattern for the burst.

3.1.4.2.1 Pattern RAM

Function: Pattern Generator Memory Block from 0x40000 to 0x7FFFC.

Type: unsigned binary word (32-bit)

Address Range: 0x0000 0000 to 0x00FF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: 64K block of unsigned 32-bit words. The data in each 32-bit word is bit-mapped per channel.

Pattern RAM

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

Ch24

Ch23

Ch22

Ch21

Ch20

Ch19

Ch18

Ch17

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Ch16

Ch15

Ch14

Ch13

Ch12

Ch11

Ch10

Ch9

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

3.1.4.2.2 Pattern RAM Start Address

Function: When the Mode Select register is programmed for Pattern Generator mode (34), the Pattern RAM Start Address register specifies the starting address within the Pattern RAM block registers to use for the output.

Type: unsigned binary word (32-bit)

Data Range: 0x0004 0000 to 0x0007 FFFC

Read/Write: R/W

Initialized Value: 0

Operational Settings: The value in the Pattern RAM Start Address must be less than the value in the Pattern RAM End Address.

Pattern RAM Start Address

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

D

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

D

3.1.4.2.3 Pattern RAM End Address

Function: When the Mode Select register is programmed for Pattern Generator mode (34), the Pattern RAM End Address register specifies the end address within the Pattern RAM block registers to use for the output.

Type: unsigned binary word (32-bit)

Data Range: 0x40000 to 0x7FFFC

Read/Write: R/W

Initialized Value: 0

Operational Settings: The value in the Pattern RAM End Address must be greater than the value in the Pattern RAM Start Address.

Pattern RAM End Address

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

0

D

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

D

3.1.4.2.4 Pattern RAM Period

Function: When the Mode Select register is programmed for Pattern Generator mode (34), the value in the Pattern RAM Period is used as the time interval for outputting the Pattern Generator signals.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Set the Pattern RAM Period (LSB = 10 µs).

3.1.4.2.5 Pattern RAM Control

Function: When the Mode Select register is programmed for Pattern Generator mode (34), the value in the Pattern RAM Control is used to control the outputting of the Pattern Generator signals.

Type: unsigned binary word (32-bit)

Data Range: See table

Read/Write: R/W

Initialized Value: 0

Operational Settings: Configures the Patter Generator for Continuous, Burst with a specified number of cycles, Pause, or External Trigger from input from Channel 1. Note, when any channel is configured for External Trigger Pattern Generator mode, Channel 1 must be set as an input.

Bits

Description

D31-D5

Reserved. Set to 0

D4

Falling Edge External Trigger – Channel 1 used as the input for the trigger

D3

Rising Edge External Trigger – Channel 1 used as the input for the trigger

D2

Pause

D1

Burst Mode – value in Pattern RAM Number of Cycles register defines number of cycles to output

D0

Enable Pattern Generator

Values

Description

0x0000

Disable Pattern Generator, Continuous Mode, No External Trigger

0x0001

Enable Pattern Generator, Continuous Mode, No External Trigger

0x0002

Disable Pattern Generator, Burst Mode, No External Trigger

0x0003

Enable Pattern Generator, Burst Mode, No External Trigger

0x0005

Enable Pattern Generator, Continuous Mode, Pause, No External Trigger

0x0007

Enable Pattern Generator, Burst Mode, Pause, No External Trigger

0x0008

Disable Pattern Generator, Continuous Mode, Rising External Trigger

0x0009

Enable Pattern Generator, Continuous Mode, Rising External Trigger

0x000A

Disable Pattern Generator, Burst Mode, Rising External Trigger

0x000B

Enable Pattern Generator, Burst Mode, Rising External Trigger

0x000D

Enable Pattern Generator, Continuous Mode, Pause, Rising External Trigger

0x000F

Enable Pattern Generator, Burst Mode, Pause, Rising External Trigger

0x1000

Disable Pattern Generator, Continuous Mode, Falling External Trigger

0x1001

Enable Pattern Generator, Continuous Mode, Falling External Trigger

0x1002

Disable Pattern Generator, Burst Mode, Falling External Trigger

0x1003

Enable Pattern Generator, Burst Mode, Falling External Trigger

0x1005

Enable Pattern Generator, Continuous Mode, Pause, Falling External Trigger

0x1007

Enable Pattern Generator, Burst Mode, Pause, Falling External Trigger

0x0004, 0x0006, 0x000C, 0x000E, 0x1004, 0x1006, 0x1008-0x100F

Invalid

Pattern RAM Control

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	D	D	D	D	D

3.1.4.2.6 Pattern RAM Number of Cycles

Function: When the Mode Select register is programmed for Pattern Generator mode (34) and the Pattern RAM Control register is set for Burst mode, the value in the Pattern RAM Number of Cycles is used to specify the number of times to repeat the pattern output signal.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0001 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Set the number of times to output the pattern.

4 Function Register Map

Key: Bold Italic = Configuration/Control

Bold Underline = Status

*When an event is detected, the bit associated with the event is set in this register and will remain set until the user clears the event bit. Clearing the bit requires writing a 1 back to the specific bit that was set when read (i.e. write-1-toclear, writing a ‘1' to a bit set to ‘1' will set the bit to ‘0').

Enhanced I/O Functionality Registers

0x300C

Mode Select Ch 1

R/W

0x308C

Mode Select Ch 2

R/W

0x310C

Mode Select Ch 3

R/W

0x318C

Mode Select Ch 4

R/W

0x320C

Mode Select Ch 5

R/W

0x328C

Mode Select Ch 6

R/W

0x330C

Mode Select Ch 7

R/W

0x338C

Mode Select Ch 8

R/W

0x340C

Mode Select Ch 9

R/W

0x348C

Mode Select Ch 10

R/W

0x350C

Mode Select Ch 11

R/W

0x358C

Mode Select Ch 12

R/W

0x360C

Mode Select Ch 13

R/W

0x368C

Mode Select Ch 14

R/W

0x370C

Mode Select Ch 15

R/W

0x378C

Mode Select Ch 16

R/W

0x380C

Mode Select Ch 17

R/W

0x388C

Mode Select Ch 18

R/W

0x390C

Mode Select Ch 19

R/W

0x398C

Mode Select Ch 20

R/W

0x3A0C

Mode Select Ch 21

R/W

0x3A8C

Mode Select Ch 22

R/W

0x3B0C

Mode Select Ch 23

R/W

0x3B8C

Mode Select Ch 24

R/W

0x2000

Enable Measurements/Outputs

R/W

4.1.1 Input Modes Registers

0x2004

Reset Timer/Counter

W

4.1.1.1 FIFO Registers

0x3000

FIFO Buffer Data Ch 1

R

0x3080

FIFO Buffer Data Ch 2

R

0x3100

FIFO Buffer Data Ch 3

R

0x3180

FIFO Buffer Data Ch 4

R

0x3200

FIFO Buffer Data Ch 5

R

0x3280

FIFO Buffer Data Ch 6

R

0x3300

FIFO Buffer Data Ch 7

R

0x3380

FIFO Buffer Data Ch 8

R

0x3400

FIFO Buffer Data Ch 9

R

0x3480

FIFO Buffer Data Ch 10

R

0x3500

FIFO Buffer Data Ch 11

R

0x3580

FIFO Buffer Data Ch 12

R

0x3600

FIFO Buffer Data Ch 13

R

0x3680

FIFO Buffer Data Ch 14

R

0x3700

FIFO Buffer Data Ch 15

R

0x3780

FIFO Buffer Data Ch 16

R

0x3800

FIFO Buffer Data Ch 17

R

0x3880

FIFO Buffer Data Ch 18

R

0x3900

FIFO Buffer Data Ch 19

R

0x3980

FIFO Buffer Data Ch 20

R

0x3A00

FIFO Buffer Data Ch 21

R

0x3A80

FIFO Buffer Data Ch 22

R

0x3B00

FIFO Buffer Data Ch 23

R

0x3B80

FIFO Buffer Data Ch 24

R

0x3004

FIFO Word Count Ch 1

R

0x3084

FIFO Word Count Ch 2

R

0x3104

FIFO Word Count Ch 3

R

0x3184

FIFO Word Count Ch 4

R

0x3204

FIFO Word Count Ch 5

R

0x3284

FIFO Word Count Ch 6

R

0x3304

FIFO Word Count Ch 7

R

0x3384

FIFO Word Count Ch 8

R

0x3404

FIFO Word Count Ch 9

R

0x3484

FIFO Word Count Ch 10

R

0x3504

FIFO Word Count Ch 11

R

0x3584

FIFO Word Count Ch 12

R

0x3604

FIFO Word Count Ch 13

R

0x3684

FIFO Word Count Ch 14

R

0x3704

FIFO Word Count Ch 15

R

0x3784

FIFO Word Count Ch 16

R

0x3804

FIFO Word Count Ch 17

R

0x3884

FIFO Word Count Ch 18

R

0x3904

FIFO Word Count Ch 19

R

0x3984

FIFO Word Count Ch 20

R

0x3A04

FIFO Word Count Ch 21

R

0x3A84

FIFO Word Count Ch 22

R

0x3B04

FIFO Word Count Ch 23

R

0x3B84

FIFO Word Count Ch 24

R

0x3008

FIFO Status Ch 1

R

0x3088

FIFO Status Ch 2

R

0x3108

FIFO Status Ch 3

R

0x3188

FIFO Status Ch 4

R

0x3208

FIFO Status Ch 5

R

0x3288

FIFO Status Ch 6

R

0x3308

FIFO Status Ch 7

R

0x3388

FIFO Status Ch 8

R

0x3408

FIFO Status Ch 9

R

0x3488

FIFO Status Ch 10

R

0x3508

FIFO Status Ch 11

R

0x3588

FIFO Status Ch 12

R

0x3608

FIFO Status Ch 13

R

0x3688

FIFO Status Ch 14

R

0x3708

FIFO Status Ch 15

R

0x3788

FIFO Status Ch 16

R

0x3808

FIFO Status Ch 17

R

0x3888

FIFO Status Ch 18

R

0x3908

FIFO Status Ch 19

R

0x3988

FIFO Status Ch 20

R

0x3A08

FIFO Status Ch 21

R

0x3A88

FIFO Status Ch 22

R

0x3B08

FIFO Status Ch 23

R

0x3B88

FIFO Status Ch 24

R

0x2008

Reset FIFO

W

4.1.1.2 Transition Count Registers

0x3000

Transition Count Ch 1

R

0x3080

Transition Count Ch 2

R

0x3100

Transition Count Ch 3

R

0x3180

Transition Count Ch 4

R

0x3200

Transition Count Ch 5

R

0x3280

Transition Count Ch 6

R

0x3300

Transition Count Ch 7

R

0x3380

Transition Count Ch 8

R

0x3400

Transition Count Ch 9

R

0x3480

Transition Count Ch 10

R

0x3500

Transition Count Ch 11

R

0x3580

Transition Count Ch 12

R

0x3600

Transition Count Ch 13

R

0x3680

Transition Count Ch 14

R

0x3700

Transition Count Ch 15

R

0x3780

Transition Count Ch 16

R

0x3800

Transition Count Ch 17

R

0x3880

Transition Count Ch 18

R

0x3900

Transition Count Ch 19

R

0x3980

Transition Count Ch 20

R

0x3A00

Transition Count Ch 21

R

0x3A80

Transition Count Ch 22

R

0x3B00

Transition Count Ch 23

R

0x3B80

Transition Count Ch 24

R

4.1.1.3 Frequency Measurement Registers

0x3014

Frequency Measurement Period Ch 1

R/W

0x3094

Frequency Measurement Period Ch 2

R/W

0x3114

Frequency Measurement Period Ch 3

R/W

0x3194

Frequency Measurement Period Ch 4

R/W

0x3214

Frequency Measurement Period Ch 5

R/W

0x3294

Frequency Measurement Period Ch 6

R/W

0x3314

Frequency Measurement Period Ch 7

R/W

0x3394

Frequency Measurement Period Ch 8

R/W

0x3414

Frequency Measurement Period Ch 9

R/W

0x3494

Frequency Measurement Period Ch 10

R/W

0x3514

Frequency Measurement Period Ch 11

R/W

0x3594

Frequency Measurement Period Ch 12

R/W

0x3614

Frequency Measurement Period Ch 13

R/W

0x3694

Frequency Measurement Period Ch 14

R/W

0x3714

Frequency Measurement Period Ch 15

R/W

0x3794

Frequency Measurement Period Ch 16

R/W

0x3814

Frequency Measurement Period Ch 17

R/W

0x3894

Frequency Measurement Period Ch 18

R/W

0x3914

Frequency Measurement Period Ch 19

R/W

0x3994

Frequency Measurement Period Ch 20

R/W

0x3A14

Frequency Measurement Period Ch 21

R/W

0x3A94

Frequency Measurement Period Ch 22

R/W

0x3B14

Frequency Measurement Period Ch 23

R/W

0x3B94

Frequency Measurement Period Ch 24

R/W

4.1.2 Output Mode Registers

4.1.2.1 PWM Registers

0x3014

PWM Period Ch 1

R/W

0x3094

PWM Period Ch 2

R/W

0x3114

PWM Period Ch 3

R/W

0x3194

PWM Period Ch 4

R/W

0x3214

PWM Period Ch 5

R/W

0x3294

PWM Period Ch 6

R/W

0x3394

PWM Period Ch 8

R/W

0x3414

PWM Period Ch 9

R/W

0x3494

PWM Period Ch 10

R/W

0x3514

PWM Period Ch 11

R/W

0x3594

PWM Period Ch 12

R/W

0x3614

PWM Period Ch 13

R/W

0x3694

PWM Period Ch 14

R/W

0x3714

PWM Period Ch 15

R/W

0x3794

PWM Period Ch 16

R/W

0x3814

PWM Period Ch 17

R/W

0x3894

PWM Period Ch 18

R/W

0x3314

PWM Period Ch 7

R/W

0x3914

PWM Period Ch 19

R/W

0x3994

PWM Period Ch 20

R/W

0x3A14

PWM Period Ch 21

R/W

0x3A94

PWM Period Ch 22

R/W

0x3B14

PWM Period Ch 23

R/W

0x3B94

PWM Period Ch 24

R/W

0x3010

PWM Pulse Width Ch 1

R/W

0x3090

PWM Pulse Width Ch 2

R/W

0x3110

PWM Pulse Width Ch 3

R/W

0x3190

PWM Pulse Width Ch 4

R/W

0x3210

PWM Pulse Width Ch 5

R/W

0x3290

PWM Pulse Width Ch 6

R/W

0x3310

PWM Pulse Width Ch 7

R/W

0x3390

PWM Pulse Width Ch 8

R/W

0x3410

PWM Pulse Width Ch 9

R/W

0x3490

PWM Pulse Width Ch 10

R/W

0x3510

PWM Pulse Width Ch 11

R/W

0x3590

PWM Pulse Width Ch 12

R/W

0x3018

PWM Number of Cycles Ch 1

R/W

0x3098

PWM Number of Cycles Ch 2

R/W

0x3610

PWM Pulse Width Ch 13

R/W

0x3690

PWM Pulse Width Ch 14

R/W

0x3710

PWM Pulse Width Ch 15

R/W

0x3790

PWM Pulse Width Ch 16

R/W

0x3810

PWM Pulse Width Ch 17

R/W

0x3890

PWM Pulse Width Ch 18

R/W

0x3910

PWM Pulse Width Ch 19

R/W

0x3990

PWM Pulse Width Ch 20

R/W

0x3A10

PWM Pulse Width Ch 21

R/W

0x3A90

PWM Pulse Width Ch 22

R/W

0x3B10

PWM Pulse Width Ch 23

R/W

0x3B90

PWM Pulse Width Ch 24

R/W

0x361

PWM Number of Cycles Ch 13

R/W

0x3698

PWM Number of Cycles Ch 14

R/W

0x3118

PWM Number of Cycles Ch 3

R/W

0x3198

PWM Number of Cycles Ch 4

R/W

0x3218

PWM Number of Cycles Ch 5

R/W

0x3298

PWM Number of Cycles Ch 6

R/W

0x3318

PWM Number of Cycles Ch 7

R/W

0x3398

PWM Number of Cycles Ch 8

R/W

0x3418

PWM Number of Cycles Ch 9

R/W

0x3498

PWM Number of Cycles Ch 10

R/W

0x3518

PWM Number of Cycles Ch 11

R/W

0x3598

PWM Number of Cycles Ch 12

R/W

0x3718

PWM Number of Cycles Ch 15

R/W

0x3798

PWM Number of Cycles Ch 16

R/W

0x3818

PWM Number of Cycles Ch 17

R/W

0x3898

PWM Number of Cycles Ch 18

R/W

0x3918

PWM Number of Cycles Ch 19

R/W

0x3998

PWM Number of Cycles Ch 20

R/W

0x3A18

PWM Number of Cycles Ch 21

R/W

0x3A98

PWM Number of Cycles Ch 22

R/W

0x3B18

PWM Number of Cycles Ch 23

R/W

0x3B98

PWM Number of Cycles Ch 24

R/W

0x200C

PWM Output Polarity

R/W

4.1.2.2 Pattern Generator Registers

0x0004 0000 to 0x0007 FFFC

Pattern RAM

R/W

0x2010

Pattern RAM Period

R/W

0x2014

Pattern RAM Start Address

R/W

0x2018

Pattern RAM End Address

R/W

0x201C

Pattern RAM Control

R/W

0x2020

Pattern RAM Number of Cycles

R/W

NAI Cares

North Atlantic Industries (NAI) is a leading independent supplier of Embedded I/O Boards, Single Board Computers, Rugged Power Supplies, Embedded Systems and Motion Simulation and Measurement Instruments for the Military, Aerospace and Industrial Industries. We accelerate our clients' time-to-mission with a unique approach based on a Custom-on-Standard Architecture™ (COSA®) that delivers the best of both worlds: custom solutions from standard COTS components.

We have built a reputation by listening to our customers, understanding their needs, and designing, testing and delivering board and system-level products for their most demanding air, land and sea requirements. If you have any applications or questions regarding the use of our products, please contact us for an expedient solution. Please visit us at: www.naii.com or select one of the following for immediate assistance:

FAQ

http://www.naii.com/faq/

Application Notes

http://www.naii.com/appNotes/

Calibration and Repairs

http://www.naii.com/calibration/

Call Us

(631) 567-1100

Revision History

Revision

Revision Date

Description

Author

A

6/17/2019

Initial release

GC

A1

4/22/2020

ECO C07519: Module manuals updated for formatting consistency. No technical or specification update.

MC

STATUS AND INTERRUPTS

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Status registers indicate the detection of faults or events. The status registers can be channel bit-mapped or event bit-mapped. An example of a channel bit-mapped register is the BIT status register, and an example of an event bit-mapped register is the FIFO status register.

For those status registers that allow interrupts to be generated upon the detection of the fault or the event, there are four registers associated with each status: Dynamic, Latched, Interrupt Enabled, and Set Edge/Level Interrupt.

Dynamic Status: The Dynamic Status register indicates the current condition of the fault or the event. If the fault or the event is momentary, the contents in this register will be clear when the fault or the event goes away. The Dynamic Status register can be polled, however, if the fault or the event is sporadic, it is possible for the indication of the fault or the event to be missed.

Latched Status: The Latched Status register indicates whether the fault or the event has occurred and keeps the state until it is cleared by the user. Reading the Latched Status register is a better alternative to polling the Dynamic Status register because the contents of this register will not clear until the user commands to clear the specific bit(s) associated with the fault or the event in the Latched Status register. Once the status register has been read, the act of writing a 1 back to the applicable status register to any specific bit (channel/event) location will “clear” the bit (set the bit to 0). When clearing the channel/event bits, it is strongly recommended to write back the same bit pattern as read from the Latched Status register. For example, if the channel bit-mapped Latched Status register contains the value 0x0000 0005, which indicates fault/event detection on channel 1 and 3, write the value 0x0000 0005 to the Latched Status register to clear the fault/event status for channel 1 and 3. Writing a “1” to other channels that are not set (example 0x0000 000F) may result in incorrectly “clearing” incoming faults/events for those channels (example, channel 2 and 4).

Interrupt Enable: If interrupts are preferred upon the detection of a fault or an event, enable the specific channel/event interrupt in the Interrupt Enable register. The bits in Interrupt Enable register map to the same bits in the Latched Status register. When a fault or event occurs, an interrupt will be fired. Subsequent interrupts will not trigger until the application acknowledges the fired interrupt by clearing the associated channel/event bit in the Latched Status register. If the interruptible condition is still persistent after clearing the bit, this may retrigger the interrupt depending on the Edge/Level setting.

Set Edge/Level Interrupt: When interrupts are enabled, the condition on retriggering the interrupt after the Latch Register is “cleared” can be specified as “edge” triggered or “level” triggered. Note, the Edge/Level Trigger also affects how the Latched Register value is adjusted after it is “cleared” (see below).

Edge triggered: An interrupt will be retriggered when the Latched Status register change from low (0) to high (1) state. Uses for edgetriggered interrupts would include transition detections (Low-to-High transitions, High-to-Low transitions) or fault detections. After “clearing” an interrupt, another interrupt will not occur until the next transition or the re-occurrence of the fault again.
Level triggered: An interrupt will be generated when the Latched Status register remains at the high (1) state. Level-triggered interrupts are used to indicate that something needs attention.

Interrupt Vector and Steering

When interrupts are enabled, the interrupt vector associated with the specific interrupt can be programmed with a unique number/identifier defined by the user such that it can be utilized in the Interrupt Service Routine (ISR) to identify the type of interrupt. When an interrupt occurs, the contents of the Interrupt Vector registers is reported as part of the interrupt mechanism. In addition to specifying the interrupt vector, the interrupt can be directed (“steered”) to the native bus or to the application running on the onboard ARM processor.

Interrupt Trigger Types

In most applications, limiting the number of interrupts generated is preferred as interrupts are costly, thus choosing the correct Edge/Level interrupt trigger to use is important.

Example 1: Fault detection

This example illustrates interrupt considerations when detecting a fault like an “open” on a line. When an “open” is detected, the system will receive an interrupt. If the “open” on the line is persistent and the trigger is set to “edge”, upon “clearing” the interrupt, the system will not regenerate another interrupt. If, instead, the trigger is set to “level”, upon “clearing” the interrupt, the system will re-generate another interrupt. Thus, in this case, it will be better to set the trigger type to “edge”.

Example 2: Threshold detection

This example illustrates interrupt considerations when detecting an event like reaching or exceeding the “high watermark” threshold value. In a communication device, when the number of elements received in the FIFO reaches the high-watermark threshold, an interrupt will be generated. Normally, the application would read the count of the number of elements in the FIFO and read this number of elements from the FIFO. After reading the FIFO data, the application would “clear” the interrupt. If the trigger type is set to “edge”, another interrupt will be generated only if the number of elements in FIFO goes below the “high watermark” after the “clearing” the interrupt and then fills up to reach the “high watermark” threshold value. Since receiving communication data is inherently asynchronous, it is possible that data can continue to fill the FIFO as the application is pulling data off the FIFO. If, at the time the interrupt is “cleared”, the number of elements in the FIFO is at or above the “high watermark”, no interrupts will be generated. In this case, it will be better to set the trigger type to “level”, as the purpose here is to make sure that the FIFO is serviced when the number of elements exceeds the high watermark threshold value. Thus, upon “clearing” the interrupt, if the number of elements in the FIFO is at or above the “high watermark” threshold value, another interrupt will be generated indicating that the FIFO needs to be serviced.

Dynamic and Latched Status Registers Examples

The examples in this section illustrate the differences in behavior of the Dynamic Status and Latched Status registers as well as the differences in behavior of Edge/Level Trigger when the Latched Status register is cleared.

Figure 1. Example of Module’s Channel-Mapped Dynamic and Latched Status States

No Clearing of Latched Status

Clearing of Latched Status (Edge-Triggered)

Clearing of Latched Status (Level-Triggered)

Time

Dynamic Status

Latched Status

Action

Latched Status

Action

Latched

T0

0x0

Read Latched Register

0x0

Read Latched Register

0x0

T1

0x1

Read Latched Register

0x1

Write 0x1 to Latched Register

0x0

0x1

T2

0x0

0x1

Read Latched Register

0x0

Read Latched Register

0x1

Write 0x1 to Latched Register

0x0

T3

0x2

0x3

Read Latched Register

0x2

Read Latched Register

0x2

Write 0x2 to Latched Register

0x0

0x2

T4

0x2

0x3

Read Latched Register

0x1

Read Latched Register

0x3

Write 0x1 to Latched Register

Write 0x3 to Latched Register

0x0

0x2

T5

0xC

0xF

Read Latched Register

0xC

Read Latched Register

0xE

Write 0xC to Latched Register

Write 0xE to Latched Register

0x0

0xC

T6

0xC

0xF

Read Latched Register

0x0

Read Latched

0xC

Write 0xC to Latched Register

0xC

T7

0x4

0xF

Read Latched Register

0x0

Read Latched Register

0xC

Write 0xC to Latched Register

0x4

T8

0x4

0xF

Read Latched Register

0x0

Read Latched Register

0x4

Interrupt Examples

The examples in this section illustrate the interrupt behavior with Edge/Level Trigger.

Figure 2. Illustration of Latched Status State for Module with 4-Channels with Interrupt Enabled

Time

Latched Status (Edge-Triggered – Clear Multi-Channel)

Latched Status (Edge-Triggered – Clear Single Channel)

Latched Status (Level-Triggered – Clear Multi-Channel)

Action

Latched

Action

Latched

Action

Latched

T1 (Int 1)

Interrupt Generated Read Latched Registers

0x1

Interrupt Generated Read Latched Registers

0x1

Interrupt Generated Read Latched Registers

0x1

Write 0x1 to Latched Register

0x0

Interrupt re-triggers Note, interrupt re-triggers after each clear until T2.

0x1

T3 (Int 2)

Interrupt Generated Read Latched Registers

0x2

Interrupt Generated Read Latched Registers

0x2

Interrupt Generated Read Latched Registers

0x2

Write 0x2 to Latched Register

0x0

Interrupt re-triggers Note, interrupt re-triggers after each clear until T7.

0x2

T4 (Int 3)

Interrupt Generated Read Latched Registers

0x1

Interrupt Generated Read Latched Registers

0x1

Interrupt Generated Read Latched Registers

0x3

Write 0x1 to Latched Register

Write 0x3 to Latched Register

0x0

Interrupt re-triggers Note, interrupt re-triggers after each clear and 0x3 is reported in Latched Register until T5.

0x3

Interrupt re-triggers Note, interrupt re-triggers after each clear until T7.

0x2

T6 (Int 4)

Interrupt Generated Read Latched Registers

0xC

Interrupt Generated Read Latched Registers

0xC

Interrupt Generated Read Latched Registers

0xE

Write 0xC to Latched Register

Write 0x4 to Latched Register

Write 0xE to Latched Register

0x0

Interrupt re-triggers Write 0x8 to Latched Register

0x8

Interrupt re-triggers Note, interrupt re-triggers after each clear and 0xE is reported in Latched Register until T7.

0xE

0x0

Interrupt re-triggers Note, interrupt re-triggers after each clear and 0xC is reported in Latched Register until T8.

0xC

Interrupt re-triggers Note, interrupt re-triggers after each clear and 0x4 is reported in Latched Register always.

0x4

Revision History

Revision

Revision Date

Description

Draft/Apprv.

A

6/25/2019

Initial release

GC

A1

10/7/2019

Appended “User” to Watchdog Timer to indicate that the Watchdog Timer is controlled by the user’s application.

GC

A2

4/22/2020

ECO C07519: Module manuals updated for formatting consistency. No technical or specification updates.

MC

B

3/29/2021

ECO C08381: Re-identified Digital-to-Synchro/Resolver (D/S) or Digital-toL®VDT (D/LV) Modules are currently unsupported (at this time).

ARS

USER WATCHDOG TIMER MODULE MANUAL

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User Watchdog Timer Capability

The User Watchdog Timer (UWDT) Capability is available on the following modules:

AC Reference Source Modules
- AC1 - 1 Channel, 2-115 Vrms, 47 Hz - 20kHz
- AC2 - 2 Channels, 2-28 Vrms, 47 Hz - 20kHz
- AC3 - 1 Channel, 28-115 Vrms, 47 Hz - 2.5 kHz
Differential Transceiver Modules
- DF1/DF2 - 16 Channels Differential I/O
Digital-to-Analog (D/A) Modules
- DA1 - 12 Channels, ±10 VDC @ 25 mA, Voltage or Current Control Modes
- DA2 - 16 Channels, ±10 VDC @ 10 mA
- DA3 - 4 Channels, ±40 VDC @ ±100 mA, Voltage or Current Control Modes
- DA4 - 4 Channels, ±80 VDC @ 10 mA
- DA5 - 4 Channels, ±65 VDC or ±2 A, Voltage or Current Control Modes
Digital-to-Synchro/Resolver (D/S) or Digital-to-L( R )VDT (D/LV) Modules
- (Not supported)
Discrete I/O Modules
- DT1/DT4 - 24 Channels, Programmable for either input or output, output up to 500 mA per channel from an applied external 3 - 60 VCC source.
- DT2/DT5 - 16 Channels, Programmable for either input voltage measurements (±80 V) or as a bi-directional current switch (up to 500 mA per channel).
- DT3/DT6 - 4 Channels, Programmable for either input voltage measurements (±100 V) or as a bi-directional current switch (up to 3 A per channel).
TTL/CMOS Modules
- TL1-TL8 - 24 Channels, Programmable for either input or output.

Principle of Operation

The User Watchdog Timer is optionally activated by the applications that require the module’s outputs to be disabled as a failsafe in the event of an application failure or crash. The circuit is designed such that a specific periodic write strobe pattern must be executed by the software to maintain operation and prevent the disablement from taking place.

The User Watchdog Timer is inactive until the application sends an initial strobe by writing the value 0x55AA to the UWDT Strobe register. After activating the User Watchdog Timer, the application must continually strobe the timer within the intervals specified with the configurable UWDT Quiet Time and UWDT Window registers. The timing of the strobes must be consistent with the following rules:

The application must not strobe during the Quiet time.
The application must strobe within the Window time.
The application must not strobe more than once in a single window time.

A violation of any of these rules will trigger a User Watchdog Timer fault and result in shutting down any isolated power supplies and/or disabling any active drive outputs, as applicable for the specific module. Upon a User Watchdog Timer event, recovery to the module shutting down will require the module to be reset.

The Figure 1 and Figure 2 provides an overview and an example with actual values for the User Watchdog Timer Strobes, Quiet Time and Window. As depicted in the diagrams, there are two processes that run in parallel. The Strobe event starts the timer for the beginning of the “Quiet Time”. The timer for the Previous Strobe event continues to run to ensure that no additional Strobes are received within the “Window” associated with the Previous Strobe.

The optimal target for the user watchdog strobes should be at the interval of [Quiet time + ½ Window time] after the previous strobe, which will place the strobe in the center of the window. This affords the greatest margin of safety against unintended disablement in critical operations.

WDT Diagram Fig1

Figure 1. User Watchdog Timer Overview

WDT Diagram Example Fig2

Figure 2. User Watchdog Timer Example

WDT Diagram Errors Fig3

Figure 3. User Watchdog Timer Failures

Register Descriptions

The register descriptions provide the register name, Type, Data Range, Read or Write information, Initialized Value, and a description of the function.

User Watchdog Timer Registers

The registers associated with the User Watchdog Timer provide the ability to specify the UWDT Quiet Time and the UWDT Window that will be monitored to ensure that EXACTLY ONE User Watchdog Timer (UWDT) Strobe is written within the window.

UWDT Quiet Time

Function: Sets Quiet Time value (in microseconds) to use for the User Watchdog Timer Frame.

Type: unsigned binary word (32-bit)

Data Range: 0 µsec to 2^32 µsec (0x0 to 0xFFFFFFFF)

Read/Write: R/W

Initialized Value: 0x0

Operational Settings: LSB = 1 µsec. The application must NOT write a strobe in the time between the previous strobe and the end of the Quiet time interval. In addition, the application must write in the UWDT Window EXACTLY ONCE.

UWDT Window

Function: Sets Window value (in microseconds) to use for the User Watchdog Timer Frame.

Type: unsigned binary word (32-bit)

Data Range: 0 µsec to 2^32 µsec (0x0 to 0xFFFFFFFF)

Read/Write: R/W

Initialized Value: 0x0

Operational Settings: LSB = 1 µsec. The application must write the strobe once within the Window time after the end of the Quiet time interval. The application must write in the UWDT Window EXACTLY ONCE. This setting must be initialized to a non-zero value for operation and should allow sufficient tolerance for strobe timing by the application.

UWDT Strobe

Function: Writes the strobe value to be use for the User Watchdog Timer Frame.

Type: unsigned binary word (32-bit)

Data Range: 0x55AA

Read/Write: W

Initialized Value: 0x0

Operational Settings: At startup, the user watchdog is disabled. Write the value of 0x55AA to this register to start the user watchdog timer monitoring after initial power on or a reset. To prevent a disablement, the application must periodically write the strobe based on the user watchdog timer rules.

Status and Interrupt

The modules that are capable of User Watchdog Timer support provide status registers for the User Watchdog Timer.

User Watchdog Timer Status

The status register that contains the User Watchdog Timer Fault information is also used to indicate channel Inter-FPGA failures on modules that have communication between FPGA components. There are four registers associated with the User Watchdog Timer Fault/Inter-FPGA Failure Status: Dynamic, Latched, Interrupt Enable, and Set Edge/Level Interrupt.

Table 1. User Watchdog Timer Status
User Watchdog Timer Fault/Inter-FPGA Failure Dynamic Status
User Watchdog Timer Fault/Inter-FPGA Failure Latched Status
User Watchdog Timer Fault/Inter-FPGA Failure Interrupt Enable
User Watchdog Timer Fault/Inter-FPGA Failure Set Edge/Level Interrupt
Bit(s)	Status	Description
D31	User Watchdog Timer Fault Status	0 = No Fault 1 = User Watchdog Timer Fault
D30:D0	Reserved for Inter-FPGA Failure Status	Channel bit-mapped indicating channel inter

Function: Sets the corresponding bit (D31) associated with the channel’s User Watchdog Timer Fault error.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R (Dynamic), R/W (Latched, Interrupt Enable, Set Edge/Level Interrupt)

Initialized Value: 0

Interrupt Vector and Steering

When interrupts are enabled, the interrupt vector associated with the specific interrupt can be programmed (typically with a unique number/identifier) such that it can be utilized in the Interrupt Service Routine (ISR) to identify the type of interrupt. When an interrupt occurs, the contents of the Interrupt Vector registers is reported as part of the interrupt mechanism.

In addition to specifying the interrupt vector, the interrupt can be directed (“steered”) to the native bus or to the application running on the onboard ARM processor.

Note	the Interrupt Vector and Interrupt Steering registers are mapped to the Motherboard Common Memory and these registers are associated with the Module Slot position (refer to Function Register Map).

Interrupt Vector

Function: Set an identifier for the interrupt.

Type: unsigned binary word (32-bit)

Data Range: 0 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: When an interrupt occurs, this value is reported as part of the interrupt mechanism.

Interrupt Steering

Function: Sets where to direct the interrupt.

Type: unsigned binary word (32-bit)

Data Range: See table

Read/Write: R/W

Initialized Value: 0

Operational Settings: When an interrupt occurs, the interrupt is sent as specified:

Direct Interrupt to VME	1
Direct Interrupt to ARM Processor (via SerDes) (Custom App on ARM or NAI Ethernet Listener App)	2
Direct Interrupt to PCIe Bus	5
Direct Interrupt to cPCI Bus	6

Function Register Map

Key

Bold Underline

= Measurement/Status/Board Information

Bold Italic

= Configuration/Control

User Watchdog Timer Registers

0x01C0

UWDT Quiet Time

R/W

0x01C4

UWDT Window

R/W

0x01C8

UWDT Strobe

W

Status Registers

User Watchdog Timer Fault/Inter-FPGA Failure

0x09B0

Dynamic Status

R

0x09B4

Latched Status*

R/W

0x09B8

Interrupt Enable

R/W

0x09BC

Set Edge/Level Interrupt

R/W

Interrupt Registers

The Interrupt Vector and Interrupt Steering registers are mapped to the Motherboard Memory Space and these addresses are absolute based on the module slot position. In other words, do not apply the Module Address offset to these addresses.

0x056C

Module 1 Interrupt Vector 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x066C

Module 1 Interrupt Steering 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x076C

Module 2 Interrupt Vector 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x086C

Module 2 Interrupt Steering 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x096C

Module 3 Interrupt Vector 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0A6C

Module 3 Interrupt Steering 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0B6C

Module 4 Interrupt Vector 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0C6C

Module 4 Interrupt Steering 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0D6C

Module 5 Interrupt Vector 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0E6C

Module 5 Interrupt Steering 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0F6C

Module 6 Interrupt Vector 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x106C

Module 6 Interrupt Steering 28 - User Watchdog Timer Fault/Inter-FPGA Failure

R/W

Interrupt Vector and Steering

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When interrupts are enabled, the interrupt vector associated with the specific interrupt can be programmed (typically with a unique number/identifier) such that it can be utilized in the Interrupt Service Routine (ISR) to identify the type of interrupt. When an interrupt occurs, the contents of the Interrupt Vector registers is reported as part of the interrupt mechanism. In addition to specifying the interrupt vector, the interrupt can be directed (“steered”) to the native bus or to the application running on the onboard ARM processor.

Note	The Interrupt Vector and Interrupt Steering registers are mapped to the Motherboard Common Memory and these registers are associated with the Module Slot position (refer to Function Register Map).

Interrupt Vector

Function: Set an identifier for the interrupt.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R/W

Initialized Value: 0

Operational Settings: When an interrupt occurs, this value is reported as part of the interrupt mechanism.

Interrupt Steering

Function: Sets where to direct the interrupt.

Type: unsigned binary word (32-bit)

Data Range: See table Read/Write: R/W

Initialized Value: 0

Operational Settings: When an interrupt occurs, the interrupt is sent as specified:

Direct Interrupt to VME	1
Direct Interrupt to ARM Processor (via SerDes) (Custom App on ARM or NAI Ethernet Listener App)	2
Direct Interrupt to PCIe Bus	5
Direct Interrupt to cPCI Bus	6

0x096C

Module 3 Interrupt Vector 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0A6C

Module 3 Interrupt Steering 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0B6C

Module 4 Interrupt Vector 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0C6C

Module 4 Interrupt Steering 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0D6C

Module 5 Interrupt Vector 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0E6C

Module 5 Interrupt Steering 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x0F6C

Module 6 Interrupt Vector 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

0x106C

Module 6 Interrupt Steering 28 – User Watchdog Timer Fault/Inter-FPGA Failure

R/W

Revision History

Revision

Revision Date

Description

Author

A

2/1/2018

Initial release

SL

A1

2/13/2018

ECO C05364, update to title page

SL

A2

3/5/2018

ECO C05412, updates to module manual consistency

SL

A3

8/15/2018

ECO C05798, correction to Pattern Ram Control register

SL

NAI Cares

Edit this on GitLab

North Atlantic Industries (NAI) is a leading independent supplier of Embedded I/O Boards, Single Board Computers, Rugged Power Supplies, Embedded Systems and Motion Simulation and Measurement Instruments for the Military, Aerospace and Industrial Industries. We accelerate our clients’ time-to-mission with a unique approach based on a Configurable Open Systems Architecture™ (COSA®) that delivers the best of both worlds: custom solutions from standard COTS components.

We have built a reputation by listening to our customers, understanding their needs, and designing, testing and delivering board and system-level products for their most demanding air, land and sea requirements. If you have any applications or questions regarding the use of our products, please contact us for an expedient solution.

Please visit us at: www.naii.com or select one of the following for immediate assistance:

https://www.docs.naii.com

FAQ

http://www.naii.com/faq/

Application Notes

http://www.naii.com/appNotes/

Calibration and Repairs

http://www.naii.com/calibration/

Call Us

(631) 567-1100

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	D	D	D	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	D	D	D	D	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	D	D	D	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	D	D	D	D	D

Integrator Resources

32-Channel Discrete I/O

Introduction

Features

INPUT CHARACTERISTICS

BIDIRECTIONAL SWITCH

Principle of Operation

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	0	D	D	D	D

D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
0	0	0	0	0	0	0	0	0	0	0	D	D	D	D	D