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8-Channel RTD Measurement

RT1 Measurement & Simulation Modules Thermocouple and RTD Measurement

Function Modules 8 Channels, RTD Measurement

The module provides 8 measurement channels, and can be programmed for interfacing to 2, 3, and 4-wire platinum RTD sensor configurations. The 4- wire mode is the most accurate, providing excellent stability and repeatability. The RTD channels feature individual A/D converters and precision excitation/current drive. Programmable lead-wire compensation is provided for inherently less accurate 2 and 3-wire configurations. All RTD channels are self-aligning because each channel is automatically "aligned" on a rotating basis to eliminate offset and gain errors throughout the operating envelope. Programmability for expected resistance range and wire modes allows for optimization of scaling/resolution, as well as flexibility in reading many RTD types.

The RT1 is used to measure temperature by providing the measured resistance of the RTD element. By correlating the characteristic resistance with the temperature algorithm of the specific RTD utilized, the temperature can be resolved. Most RTD elements consist of a length of fine coiled wire wrapped around a ceramic or glass core. The element is usually quite fragile, so it is often placed inside a sheathed probe to protect it. The RTD element is made from a pure material, typically platinum, nickel, or copper. The material has a predictable change in resistance as the temperature changes; it is this predictable change that is used to determine temperature.

Due to higher accuracy and repeatability, RTDs are increasing in use as compared with thermocouples in many industrial/embedded and test applications below 600° C.

Features

*RTD Measurement

*Higher accuracy and repeatability as compared with thermocouples in applications below 600 °C

*Two, three or four-wire mode

*Channels are calibrated at the factory for Pt100, Pt500, Pt1000 and Pt2000 RTDs

*Single Precision Floating Point Value (IEEE-754) format

*Open sensor connections are detected and reported

*1 mA, 500 µA, 250 µA & 100 µA excitation sources for Pt100, Pt500, Pt1000 and Pt2000 ranges

*Independently Programmable

*Up to 8 RTD channels

*Programmable Sample Rate

*Sets the sampling rate of the A/D

*Offset Temperature

*Provides ability to null for any system induced measurement errors

Specifications

Number of Channels

8 Channels

Analog Input Resolution

24-bits per channel

RTD Interface

4, 3, or 2-wire RTD interface capability. Specifically designed for use with 100Ω, 500Ω, 1000Ω and 2000Ω RTDs, or any RTD whose maximum operating resistance is less than 8000Ω.

Open Line Detection

Ability to detect an open in any line or RTD in all wire modes.

Excitation

1mA (Pt100), 500µA (Pt500), 250µA (Pt1000) or 100µA (Pt2000) for 2- & 4-wire mode; 500µA (Pt100), 250µA (Pt500), 125µA (P1000) or 50µA (Pt2000) for 3-wire mode

Accuracy

±0.1% of full-scale value @ 5 samples per second (4-wire mode only), ±0.2% of full-scale value @ 5 samples per second (3-wire mode only), ±1.2% of full-scale value @ 5 samples per second (2-wire mode only)

Sample Rate

Programmable between 3 - 4800 Hz

Output Format

Resistance/Temperature

ESD Protection

Designed to meet the testing requirements of IEC 801-2 Level 2. (4 KV transient with a peak current of 7.5 A and a Tc of approximately 60 ns.)

Power

5 VDC @ 450 mA typical

Ground

All channel grounds are common and are isolated from system ground.

Weight

1.5 oz. (42 g)

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Architected for Versatility

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NAI’s Custom-On-Standard Architecture™ (COSA®) offers a choice of over 40 Intelligent I/O, communications, or Ethernet switch functions, providing the highest packaging density and greatest flexibility of any 3U SBC in the industry. Preexisting, fully-tested functions can be combined in an unlimited number of ways quickly and easily.

Board Support Package and Software Support

The 75PPC1 includes BSP and SDK support for Wind River® VxWorks®. In addition, software support kits are supplied, with source code and board-specific library I/O APIs, to facilitate system integration. Each I/O function has dedicated processing, unburdening the SBC from unnecessary data management overhead.

Background Built-In-Test (BIT)

BIT continuously monitors the status of all I/O during normal operations and is totally transparent to the user. SBC resources are not consumed while executing BIT routines. This simplifies maintenance, assures operational readiness, reduces life-cycle costs and— keeps your systems mission ready.

One-Source Efficiencies

Eliminate man-months of integration with a configured, field-proven system from NAI. Specification to deployment is a seamless experience as all design, state-of-the-art manufacturing, assembly and test are performed— by one trusted source. All facilities are in the U.S. and optimized for high-mix/low volume production runs and extended lifecycle support.

Product Lifecycle Management

From design-in to production, and beyond, NAI’s product lifecycle management strategy ensures the long-term availability of COTS products through configuration management, technology refresh, and obsolescence component purchase and storage.

INTRODUCTION

As a leading manufacturer of smart function modules, NAI offers over 100 different modules that cover a wide range of I/O, measurement and simulation, communications, Ethernet switch, and SBC functions. Our Resistance Temperature Detector (RTD) module is individually configurable for up to 8 isolated measurement channels. and can interface to two, three and four-wire platinum RTD sensor configurations. This user manual is designed to help you get the most out of our RTD smart function module.

RT1 Overview

NAI’s RT1 module offers a range of advanced features tailored to meet the demands of precision measurement applications, particularly in scenarios with temperatures below 600°C where accuracy and repeatability are paramount. Designed with meticulous attention to detail, this module offers a comprehensive solution for electrical engineers seeking top-tier performance.

RTD Measurement

Higher Accuracy and Repeatability: The RT1 module excels in accuracy and repeatability when compared to thermocouples, making it an ideal choice for applications with operating temperatures below 600°C. This characteristic ensures that critical measurements are obtained with the utmost precision.
Wire Modes: The module provides flexibility with two, three, or four-wire modes, allowing users to adapt to various measurement setups and requirements, enhancing versatility in different scenarios.
Factory Calibration: NAI takes precision seriously by calibrating channels at the factory for Pt100, Pt500, Pt1000, and Pt2000 RTDs. This ensures that the module is ready for precise measurements right out of the box, saving time and effort in calibration.
Data Format: The module utilizes the Single Precision Floating Point Value (IEEE-754) format for data representation, enabling compatibility and ease of integration with other systems and equipment.
Open Sensor Detection: The RT1 module is equipped with a built-in feature to detect and report open sensor connections. This safeguards against inaccurate measurements caused by sensor failures, promoting data integrity.
Excitation Sources: To accommodate various RTD ranges, the module provides excitation sources of 1 mA, 500 μA, 250 μA, and 100 μA for Pt100, Pt500, Pt1000, and Pt2000 ranges. This feature ensures precise measurements across a wide range of applications.

Independently Programmable

The RT1 module offers the capability to independently program up to 8 RTD channels. This feature is invaluable for engineers working on complex systems with multiple measurement points, allowing for tailored configuration and control.

Programmable Sample Rate

Users can set the sampling rate of the analog-to-digital converter (A/D) to match the specific needs of their application. This programmable sample rate ensures that data acquisition is optimized for accuracy and efficiency.

Offset Temperature

The offset temperature feature provides engineers with the means to nullify system-induced measurement errors. This is crucial in achieving the highest level of measurement precision and reliability, especially in critical applications where accuracy is paramount.

PRINCIPLE OF OPERATION

The RT1 provides 8 RTD measurement channels. Each channel is configurable for use with 4-wire, 3-wire, or 2-wire connections to the RTD sensors. All RTD channels are calibrated at the factory and measurement results provided in Single Precision Floating Point Value (IEEE-754) format.

Open sensor connections are detected and reported in an Open status word. A 1mA excitation source is used for resistance measurement in the lowest range setting (Pt100). For the Pt500, Pt1000 and Pt2000 ranges, the excitation current sources are 500µA, 250µA, and 100µA respectively.

Lead resistance correction is available in 2-wire mode, allowing for user compensation of cabling resistance in the measurement system. Resistance values may be entered for individual channels, which are subtracted from the measurement. The temperature measurements will reflect the compensated resistance values for the RTD for direct readout of the corrected temperature readings.

As with the Thermocouple mode, the temperature offset provisions allow for the same nulling of the temperature offsets in the system and operate similarly.

2-Wire is the simplest resistance measurement configuration, requiring only two wires per sensor. Measurements will be very sensitive to test cabling, as the excitation current and voltage measurements are through the same wires. Short or low resistance test leads are needed for accurate readings. Provisions for nulling the test lead resistances are provided via individual 2-wire offset resistance registers, allowing direct readings of the compensated measurements on a per channel basis.

3-Wire configuration relies on balanced test lead resistance on the Sense (+) and Sense (-) wires, so the voltage drop across each of the two current source lines are equal and cancel each other out. The differential voltage reading between the two sense lines along with the excitation current through the resistor is used in the resulting calculation of the sensor resistance. The test lead wire length will not affect the measurement provided the two lines are equal in resistance and is often the best compromise between wiring requirements and accuracy. In 3-Wire mode, the excitation current is split in half. Half of the total current flows on each of the sense lines (see 3-Wire RTD connection diagram).

4-Wire configuration provides optimal accuracy, allowing precise measurements without any constraints of short or balanced test leads, but requires 4 wires per sensor. The two sense wires measure the voltage at the sensor independently without undue influence of voltage drops due to the excitation current. This configuration is recommended where accuracy is a priority over the additional wiring requirements.

Built-In-Test (BIT)/Diagnostic Capability

Automatic background BIT testing is provided. Each channel is checked for correct A/D operation using an on-board 100 Ω nominal resistor. The open input detection test applies a 0.5 µA current to the A/D converter inputs. The FPGA then tests for a full-scale reading, indicating an open circuit. Any failure triggers an interrupt, if enabled, with the results available in the status registers. The testing is totally transparent to the user and has no effect on the operation of this module. It can be enabled or disabled. It is enabled by default.

Temperature Threshold Detect Programming

The RT1 provides the ability to program two temperature thresholds that will result in temperature alerts. For each threshold, a “low” and a “high” threshold value is specified that will be used to set the Temperature Alert statuses. The Temperature Threshold Low registers sets the threshold values to use to set the Temperature Alert Low status bit when the Temperature reading is below the low temperature threshold value. Conversely, the Temperature Threshold High registers sets the threshold values to use to set the Temperature Alert High status bit when the Temperature reading is above the high temperature threshold value. These threshold values are individually configurable on a per channel basis.

A possible usage of the two temperature thresholds is to use the first threshold detection levels as an early warning pre-alarm level and the second threshold detection levels as an alarm limit value. For this purpose, the Detect 2 thresholds should be set at larger deviation values from the nominal temperature than the Detect 1 thresholds.

For example:

(Threshold Low 2) < (Threshold Low 1) < (Nominal Temperature) < (Threshold High 1) < (Threshold High 2)

This allows the Detect 1 thresholds to serve as a pre-alert warning of temperature excursion, while Detect 2 may represent an alarm condition. Note: these detect thresholds are not necessarily set in this order and may be independently set either way.

Status and Interrupts

The RT1 Function Module provide registers that indicate faults or events. Refer to “Status and Interrupts Module Manual” for the Principle of Operation description.

Module Common Registers

The RT1 Function Module includes module common registers that provide access to module-level bare metal/FPGA revisions & compile times, unique serial number information, and temperature/voltage/current monitoring. Refer to “Module Common Registers Module Manual” for the detailed information.

REGISTER DESCRIPTIONS

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

RT1 Measurement Registers

Temperature (°C)

Function: Measures the temperature of the RTD sensor.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R

Initialized Value: N/A

Operational Settings: RTD temperature measurement in degrees Celsius.

Temperature (°F)

Function: Measures the temperature of the thermocouple/ RTD sensor.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R

Initialized Value: N/A

Operational Settings: RTD temperature measurement in degrees Fahrenheit.

Resistance

Function: Measures resistance of the RTD sensor.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R

Initialized Value: N/A

Operational Settings: Measures resistance in ohms. This measurement may optionally be adjusted through a user entry of a 2-wire lead resistance compensation value.

RT1 Control Registers

RTD or Thermocouple

Function: Indicates whether the module is an RTD or Thermocouple.

Data Range: 0 or 1

Read/Write: R

Initialized Value: 1 (RTD Mode)

Operational Settings: On the RT1 the value of the RTD or Thermocouple register is set to 1 for Resistance Temperature Detector (RTD) mode.

RTD or Thermocouple
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

Sample Rate

Function: Sets the sampling rate of the sensor.

Type: unsigned binary word (32-bit)

Data Range: 0x00 to 0x27 (See table)

Read/Write: R/W

Initialized Value: 0x27 (3 Hz)

Operational Settings: Set the value based on Sample Rate table. Note: lower rates provide greater stability and accuracy in the readings. Per channel configuration.

Sample Rate Register Value	Update Frequency (Hz)	Sample Rate Register Value	Update Frequency (Hz)
0x0	4800	0x14	75
0x1	2400	0x15	64
0x2	1600	0x16	60
0x3	1200	0x17	50
0x4	960	0x18	48
0x5	800	0x19	40
0x6	600	0x1A	32
0x7	480	0x1B	30
0x8	400	0x1C	25
0x9	320	0x1D	24
0xA	300	0x1E	20
0xB	240	0x1F	16
0xC	200	0x20	15
0xD	192	0x21	12
0xE	160	0x22	10
0xF	150	0x23	8
0x10	120	0x24	6
0x11	100	0x25	5
0x12	96	0x26	4
0x13	80	0x27	3

Sample Rate
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

RTD Type

Function: RTD nominal resistance at 0°C.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: See table

Read/Write: R/W

Initialized Value: 100.0 (0x42C8 0000 in floating point)

Operational Settings: Set the RTD Type as specified in the table.

RTD Type

Description

Pt100

0-100 Ω RTD; resistance range of 0 Ω to approximately 500 Ω

Pt500

0-500 Ω RTD; resistance range of 0 Ω to approximately 2000 Ω

Pt1000

0-1000 Ω.RTD; resistance range of 0 Ω to approximately 4000 Ω

Pt2000

0-2000 Ω.RTD; resistance range of 0 Ω to approximately 8000 Ω

Wire Measurement Mode

Function: Sets the RTD sensor configuration: 2, 3 or 4 wire.

Type: unsigned binary word (32-bit)

Data Range: 2 - 4

Read/Write: R/W

Initialized Value: 2 (Value is set to 2-wire default whenever channel configuration mode is changed to RTD)

Operational Settings: Set the Wire Measurement Mode as specified in the table.

Wire Measurement Mode Value

Description

2-wire configuration

3-wire configuration

4-wire configuration

Wire Measurement Mode
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	D	D	D

2-Wire Lead Resistance Compensation

Function: Set a user defined compensation resistance in ohms, primarily required for channels that are configured for 2-wire configuration in the Wire Measurement Mode register. This allows test lead or cabling resistances to be cancelled out when using a 2-wire configuration. The Resistance measurement reading is adjusted by subtracting the value set in this register to null test lead and cabling resistance. This resistance offset is also applied in 3- and 4-wire modes, though typically not required in those modes.

Note	the applied offsets will also affect the corresponding temperature readings as the adjusted resistance values are used for the internal calculation of temperature for the RTD sensors.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R/W

Initialized Value: 0.0

Operational Settings: Set the TOTAL lead resistance to be subtracted from the resistance measurement and reported in the Resistance register.

Suspend Background Maintenance Operations Register

The default configuration of the module is to run periodic self-test and calibration at 30 second intervals. During these operations, updates to the measurement readings are briefly suspended. For time critical measurements, such as using a channel for low voltage A/D measurements, the periodic internal processes may optionally be suspended for continuous and uninterrupted readings. During this suspended time, the maintenance operations for open-line detect may be triggered manually by the application at suitable intervals.

Suspend Background Maintenance Operations

Function: Holds off the performance of periodic maintenance routines for open line status checking and built in test (BIT). Used for dynamic measurements for continuous reading updates without interruption from the brief maintenance operations.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

Read/Write: R/W

Initialized Value: 0 (All channels run maintenance operations on a scheduled basis)

Operational Settings: Suspends periodic operations for open line status check and BIT. Set to 0 to perform periodic operations for channel (default). Set bit to 1 to suspend the background maintenance operations for the specified channel.

Suspend Background Maintenance Operations

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Run Open-Line Check

Function: Triggers check for open or unconnected channels to update the open status indication. This is only used when the periodic schedule has been disabled for time critical measurements. This allows the application to run the routine in between measurement sessions.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to the corresponding bit for the channel. Bit is self-clearing and will reset to zero on completion of the routine.

Run Open-Line Check

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Run BIT

Function: Triggers Built-In-Test to detect out of tolerance conditions on the measurement circuitry. Only used when the periodic schedule for the channel has been disabled for time critical measurements. This allows the user to run the routine in between measurement sessions.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

Read/Write: R/W

Initialized Value: 0

Operational Settings: Write a 1 to the corresponding bit for the channel. Bit is self-clearing and will reset to zero on completion of the routine.

Run BIT

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Temperature Threshold Detect Programming

The RTD Temperature Threshold registers provide the ability program two temperature thresholds that will result in temperature alerts.

Temperature Threshold Detect 1/2

A “low” and a “high” threshold value is specified for each temperature threshold that will be used to set the Temperature Alert statuses. The Temperature Threshold Low 1 & 2 register sets the threshold value to use to set the Temperature Alert Low 1 & 2 status bit when the Temperature reading is below the low temperature threshold value. Conversely, the Temperature Threshold High 1 & 2 register sets the threshold values to use to set the Temperature Alert High 1 status bit when the Temperature reading is above the high temperature threshold value. These threshold values are individually configurable on a per channel basis.

Temperature Threshold Low 1

Function: Sets Temperature Threshold Low 1 value in degrees Celsius for each channel.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R/W

Initialized Value: -40° C

Operational Settings: If the temperature drops below this set value, then a Temperature Alert Low 1 Status will be set. An interrupt will occur if the Temperature Alert Low 1 Interrupt Enable register is set to 1.

Temperature Threshold High 1

Function: Sets Temperature Threshold High 1 value in degrees Celsius for each channel.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R/W

Initialized Value: 25° C

Operational Settings: If the temperature exceeds the set value, then a Temperature Alert High 1 Status will be set. An interrupt will occur if the Temperature Alert High 1 Interrupt Enable register is set to 1.

Temperature Threshold Low 2

Function: Sets Temperature Threshold Low 2 value in degrees Celsius for each channel.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R/W

Initialized Value: 0°C

Operational Settings: If the temperature drops below the set value, then a Temperature Alert Low 2 Status will be set. An interrupt will occur if the Temperature Alert Low 2 Interrupt Enable register is set to 1.

Temperature Threshold High 2

Function: Sets Alert Temperature High 2 value in degrees Celsius for each channel.

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: N/A

Read/Write: R/W

Initialized Value: 100° C

Operational Settings: If the temperature exceeds the set value, then a Temperature Alert High 2 Status will be set. An interrupt will occur if the Temperature Alert High 2 Interrupt Enable register is set to 1.

Module Common Registers

Refer to “Module Common Registers Module Manual” for the register descriptions.

Status and Interrupt Registers

The RT1 Module provides status registers for BIT, Open, and Temperature Alert.

Channel Status Enabled

Function: Determines whether to update the status for the channels. This feature can be used to “mask” status bits of unused channels in status registers that are bitmapped by channel.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF (Channel Status)

Read/Write: R/W

Initialized Value: 0x0000 00FF

Operational Settings: When the bit corresponding to a given channel in the Channel Status Enabled register is not enabled (0) the status will be masked and report “0” or “no failure”. This applies to all statuses that are bitmapped by channel (BIT Status, Open Status, Temperature Alerts and Summary Status).

Note	Background BIT will continue to run even if the Channel Status Enabled is set to '0.'

Channel Status Enabled

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

BIT Status

There are four registers associated with the BIT Status: Dynamic, Latched, Interrupt Enable, and Set Edge/Level Interrupt.

BIT Dynamic Status

BIT Latched Status

BIT Interrupt Enable

BIT Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Function: Indicates the corresponding channels associated with the channel’s BIT status or configuration

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

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

Initialized Value: 0

Open Status

There are four registers associated with the Open Status: Dynamic, Latched, Interrupt Enable, and Set Edge/Level Interrupt.

Open Dynamic Status

Open Latched Status

Open Interrupt Enable

Open Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Function: Sets the corresponding bit associated with the channel’s Open status indication for an unconnected input.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

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

Initialized Value: 0

Temperature Alert Status

There are four registers associated with each of the Temperature Alert Statuses: Dynamic, Latched, Interrupt Enable, and Set Edge/Level Interrupt.

Temperature Alert Low 1 Dynamic Status

Temperature Alert Low 1 Latched Status

Temperature Alert Low 1 Interrupt Enable

Temperature Alert Low 1 Set Edge/Level Interrupt

Temperature Alert High 1 Dynamic Status

Temperature Alert High 1 Latched Status

Temperature Alert High 1 Interrupt Enable

Temperature Alert High 1 Set Edge/Level Interrupt

Temperature Alert Low 2 Dynamic Status

Temperature Alert Low 2 Latched Status

Temperature Alert Low 2 Interrupt Enable

Temperature Alert Low 2 Set Edge/Level Interrupt

Temperature Alert High 2 Dynamic Status

Temperature Alert High 2 Latched Status

Temperature Alert High 2 Interrupt Enable

Temperature Alert High 2 Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Function: Sets the corresponding bit associated with the channel’s Temperature Alert indication for temperature readings that are below or above the associated thresholds.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

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

Initialized Value: 0

Summary Status

There are four registers associated with the Summary Status: Dynamic, Latched, Interrupt Enable, and Set Edge/Level Interrupt.

Summary Status Dynamic Status

Summary Status Latched Status

Summary Status Interrupt Enable

Summary Status Set Edge/Level Interrupt

D31

D30

D29

D28

D27

D26

D25

D24

D23

D22

D21

D20

D19

D18

D17

D16

D15

D14

D13

D12

D11

D10

Ch8

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Function: Sets the corresponding bit when a fault is detected for BIT or Open on that channel.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 00FF

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

Initialized Value: 0

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

FUNCTION REGISTER MAP

|Key: |Bold Italic = Configuration/Control

Bold Underline = Measurement/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-to-clear, writing a '1' to a bit set to '1' will set the bit to '0').

~ Data is always in Floating Point.

RT1 Measurement Registers

0x1004

Temperature (°C) Ch 1~

0x1044

Temperature (°C) Ch 2~

0x1084

Temperature (°C) Ch 3~

0x10C4

Temperature (°C) Ch 4~

0x1104

Temperature (°C) Ch 5~

0x1144

Temperature (°C) Ch 6~

0x1184

Temperature (°C) Ch 7~

0x11C4

Temperature (°C) Ch 8~

0x1008

Temperature (°F) Ch 1~

0x1048

Temperature (°F) Ch 2~

0x1088

Temperature (°F) Ch 3~

0x10C8

Temperature (°F) Ch 4~

0x1108

Temperature (°F) Ch 5~

0x1148

Temperature (°F) Ch 6~

0x1188

Temperature (°F) Ch 7~

0x11C8

Temperature (°F) Ch 8~

0x1000

Resistance Ch 1~

0x1040

Resistance Ch 2~

0x1080

Resistance Ch 3~

0x10C0

Resistance Ch 4~

0x1100

Resistance Ch 5~

0x1140

Resistance Ch 6~

0x1180

Resistance Ch 7~

0x11C0

Resistance Ch 8~

RT1 Control Registers

0x2000

RTD or Thermocouple

0x1028

Sample Rate Ch 1

R/W

0x1068

Sample Rate Ch 2

R/W

0x10A8

Sample Rate Ch 3

R/W

0x10E8

Sample Rate Ch 4

R/W

0x1128

Sample Rate Ch 5

R/W

0x1168

Sample Rate Ch 6

R/W

0x11A8

Sample Rate Ch 7

R/W

0x11E8

Sample Rate Ch 8

R/W

0x100C

RTD Type Ch 1

R/W

0x104C

RTD Type Ch 2

R/W

0x108C

RTD Type Ch 3

R/W

0x10CC

RTD Type Ch 4

R/W

0x110C

RTD Type Ch 5

R/W

0x114C

RTD Type Ch 6

R/W

0x118C

RTD Type Ch 7

R/W

0x11CC

RTD Type Ch 8

R/W

0x1010

Wire Measurement Mode Ch 1

R/W

0x1050

Wire Measurement Mode Ch 2

R/W

0x1090

Wire Measurement Mode Ch 3

R/W

0x10D0

Wire Measurement Mode Ch 4

R/W

0x1110

Wire Measurement Mode Ch 5

R/W

0x1150

Wire Measurement Mode Ch 6

R/W

0x1190

Wire Measurement Mode Ch 7

R/W

0x11D0

Wire Measurement Mode Ch 8

R/W

0x1014

2-Wire Lead Resistance Compensation Ch 1~

R/W

0x1054

2-Wire Lead Resistance Compensation Ch 2~

R/W

0x1094

2-Wire Lead Resistance Compensation Ch 3~

R/W

0x10D4

2-Wire Lead Resistance Compensation Ch 4~

R/W

0x1114

2-Wire Lead Resistance Compensation Ch 5~

R/W

0x1154

2-Wire Lead Resistance Compensation Ch 6~

R/W

0x1194

2-Wire Lead Resistance Compensation Ch 7~

R/W

0x11D4

2-Wire Lead Resistance Compensation Ch 8~

R/W

0x2008

Suspend Background Operations

R/W

0x2010

Run Open-Line Check

R/W

0x2014

Run BIT

R/W

Temperature Threshold Detect Programming Registers

0x1018

Alert Temperature Low 1 Ch 1~

R/W

0x1058

Alert Temperature Low 1 Ch 2~

R/W

0x1098

Alert Temperature Low 1 Ch 3~

R/W

0x10D8

Alert Temperature Low 1 Ch 4~

R/W

0x1118

Alert Temperature Low 1 Ch 5~

R/W

0x1158

Alert Temperature Low 1 Ch 6~

R/W

0x1198

Alert Temperature Low 1 Ch 7~

R/W

0x11D8

Alert Temperature Low 1 Ch 8~

R/W

0x101C

Alert Temperature Low 2 Ch 1~

R/W

0x105C

Alert Temperature Low 2 Ch 2~

R/W

0x109C

Alert Temperature Low 2 Ch 3~

R/W

0x10DC

Alert Temperature Low 2 Ch 4~

R/W

0x111C

Alert Temperature Low 2 Ch 5~

R/W

0x115C

Alert Temperature Low 2 Ch 6~

R/W

0x119C

Alert Temperature Low 2 Ch 7~

R/W

0x11DC

Alert Temperature Low 2 Ch 8~

R/W

0x1020

Alert Temperature High 1 Ch 1~

R/W

0x1060

Alert Temperature High 1 Ch 2~

R/W

0x10A0

Alert Temperature High 1 Ch 3~

R/W

0x10E0

Alert Temperature High 1 Ch 4~

R/W

0x1120

Alert Temperature High 1 Ch 5~

R/W

0x1160

Alert Temperature High 1 Ch 6~

R/W

0x11A0

Alert Temperature High 1 Ch 7~

R/W

0x11E0

Alert Temperature High 1 Ch 8~

R/W

0x1024

Alert Temperature High 2 Ch 1~

R/W

0x1064

Alert Temperature High 2 Ch 2~

R/W

0x10A4

Alert Temperature High 2 Ch 3~

R/W

0x10E4

Alert Temperature High 2 Ch 4~

R/W

0x1124

Alert Temperature High 2 Ch 5~

R/W

0x1164

Alert Temperature High 2 Ch 6~

R/W

0x11A4

Alert Temperature High 2 Ch 7~

R/W

0x11E4

Alert Temperature High 2 Ch 8~

R/W

Status Registers

0x02B0

Channel Status Enabled

R/W

BIT Status

0x0800

Dynamic Status

0x0804

Latched Status*

R/W

0x0808

Interrupt Enable

R/W

0x080C

Set Edge/Level Interrupt

R/W

Open Status

0x0810

Dynamic Status

0x0814

Latched Status*

R/W

0x0818

Interrupt Enable

R/W

0x081C

Set Edge/Level Interrupt

R/W

Temperature Alert Low 1 Status

0x0820

Dynamic Status

0x0824

Latched Status*

R/W

0x0828

Interrupt Enable

R/W

0x082C

Set Edge/Level Interrupt

R/W

Temperature Alert Low 2 Status

0x0830

Dynamic Status

0x0834

Latched Status*

R/W

0x0838

Interrupt Enable

R/W

0x083C

Set Edge/Level Interrupt

R/W

Temperature Alert High 1 Status

0x0840

Dynamic Status

0x0844

Latched Status*

R/W

0x0848

Interrupt Enable

R/W

0x084C

Set Edge/Level Interrupt

R/W

Temperature Alert High 2 Status

0x0850

Dynamic Status

0x0854

Latched Status*

R/W

0x0858

Interrupt Enable

R/W

0x085C

Set Edge/Level Interrupt

R/W

Summary Status

0x09A0

Dynamic Status

0x09A4

Latched Status*

R/W

0x09A8

Interrupt Enable

R/W

0x09AC

Set Edge/Level Interrupt

R/W

Interrupt Registers

The Interrupt Vector and Interrupt Steering registers are located on the Motherboard Memory Space and do not require any Module Address Offsets. These registers are accessed using the absolute addresses listed in the table below.

0x0500

Module 1 Interrupt Vector 1 - BIT

R/W

0x0504

Module 1 Interrupt Vector 2 - Open

R/W

0x0508

Module 1 Interrupt Vector 3 - Temperature Alert Low 1

R/W

0x050C

Module 1 Interrupt Vector 4 - Temperature Alert Low 2

R/W

0x0510

Module 1 Interrupt Vector 5 - Temperature Alert High 1

R/W

0x0514

Module 1 Interrupt Vector 6 - Temperature Alert High 2

R/W

0x0518-0x0564

Module 1 Interrupt Vector 7-26 - Reserved

R/W

0x0568

Module 1 Interrupt Vector 27 - Summary

R/W

0x056C-0x057C

Module 1 Interrupt Vector 28-32 - Reserved

R/W

0x0600

Module 1 Interrupt Steering 1 - BIT

R/W

0x0604

Module 1 Interrupt Steering 2 - Open

R/W

0x0608

Module 1 Interrupt Steering 3 - Temperature Alert Low 1

R/W

0x060C

Module 1 Interrupt Steering 4 - Temperature Alert Low 2

R/W

0x0610

Module 1 Interrupt Steering 5 - Temperature Alert High 1

R/W

0x0614

Module 1 Interrupt Steering 6 - Temperature Alert High 2

R/W

0x0618-0x0664

Module 1 Interrupt Steering 7-26 - Reserved

R/W

0x0668

Module 1 Interrupt Steering 27 - Summary

R/W

0x066C-0x067C

Module 1 Interrupt Steering 28-32 - Reserved

R/W

0x0700

Module 2 Interrupt Vector 1 - BIT

R/W

0x0704

Module 2 Interrupt Vector 2 - Open

R/W

0x0708

Module 2 Interrupt Vector 3 - Temperature Alert Low 1

R/W

0x070C

Module 2 Interrupt Vector 4 - Temperature Alert Low 2

R/W

0x0710

Module 2 Interrupt Vector 5 - Temperature Alert High 1

R/W

0x0714

Module 2 Interrupt Vector 6 - Temperature Alert High 2

R/W

0x0718-0x0764

Module 2 Interrupt Vector 7-26 - Reserved

R/W

0x0768

Module 2 Interrupt Vector 27 - Summary

R/W

0x076C-0x077C

Module 2 Interrupt Vector 28-32 - Reserved

R/W

0x0800

Module 2 Interrupt Steering 1 - BIT

R/W

0x0804

Module 2 Interrupt Steering 2 - Open

R/W

0x0808

Module 2 Interrupt Steering 3 - Temperature Alert Low 1

R/W

0x080C

Module 2 Interrupt Steering 4 - Temperature Alert Low 2

R/W

0x0810

Module 2 Interrupt Steering 5 - Temperature Alert High 1

R/W

0x0814

Module 2 Interrupt Steering 6 - Temperature Alert High 2

R/W

0x0818-0x0864

Module 2 Interrupt Steering 7-26 - Reserved

R/W

0x0868

Module 2 Interrupt Steering 27 - Summary

R/W

0x086C-0x087C

Module 2 Interrupt Steering 28-32 - Reserved

R/W

0x0900

Module 3 Interrupt Vector 1 - BIT

R/W

0x0904

Module 3 Interrupt Vector 2 - Open

R/W

0x0908

Module 3 Interrupt Vector 3 - Temperature Alert Low 1

R/W

0x090C

Module 3 Interrupt Vector 4 - Temperature Alert Low 2

R/W

0x0910

Module 3 Interrupt Vector 5 - Temperature Alert High 1

R/W

0x0914

Module 3 Interrupt Vector 6 - Temperature Alert High 2

R/W

0x0918-0x0964

Module 3 Interrupt Vector 7-26 - Reserved

R/W

0x0968

Module 3 Interrupt Vector 27 - Summary

R/W

0x096C-0x097C

Module 3 Interrupt Vector 28-32 - Reserved

R/W

0x0A00

Module 3 Interrupt Steering 1 - BIT

R/W

0x0A04

Module 3 Interrupt Steering 2 - Open

R/W

0x0A08

Module 3 Interrupt Steering 3 - Temperature Alert Low 1

R/W

0x0A0C

Module 3 Interrupt Steering 4 - Temperature Alert Low 2

R/W

0x0A10

Module 3 Interrupt Steering 5 - Temperature Alert High 1

R/W

0x0A14

Module 3 Interrupt Steering 6 - Temperature Alert High 2

R/W

0x0A18-0x0A64

Module 3 Interrupt Steering 7-26 - Reserved

R/W

0x0A68

Module 3 Interrupt Steering 27 - Summary

R/W

0x0A6C-0x0A7C

Module 3 Interrupt Steering 28-32 - Reserved

R/W

0x0B00

Module 4 Interrupt Vector 1 - BIT

R/W

0x0B04

Module 4 Interrupt Vector 2 - Open

R/W

0x0B08

Module 4 Interrupt Vector 3 - Temperature Alert Low 1

R/W

0x0B0C

Module 4 Interrupt Vector 4 - Temperature Alert Low 2

R/W

0x0B10

Module 4 Interrupt Vector 5 - Temperature Alert High 1

R/W

0x0B14

Module 4 Interrupt Vector 6 - Temperature Alert High 2

R/W

0x0B18-0x0B64

Module 4 Interrupt Vector 7-26 - Reserved

R/W

0x0B68

Module 4 Interrupt Vector 27 - Summary

R/W

0x0B6C-0x0B7C

Module 4 Interrupt Vector 28-32 - Reserved

R/W

0x0C00

Module 4 Interrupt Steering 1 - BIT

R/W

0x0C04

Module 4 Interrupt Steering 2 - Open

R/W

0x0C08

Module 4 Interrupt Steering 3 - Temperature Alert Low 1

R/W

0x0C0C

Module 4 Interrupt Steering 4 - Temperature Alert Low 2

R/W

0x0C10

Module 4 Interrupt Steering 5 - Temperature Alert High 1

R/W

0x0C14

Module 4 Interrupt Steering 6 - Temperature Alert High 2

R/W

0x0C18-0x0C64

Module 4 Interrupt Steering 7-26 - Reserved

R/W

0x0C68

Module 4 Interrupt Steering 27 - Summary

R/W

0x0C6C-0x0C7C

Module 4 Interrupt Steering 28-32 - Reserved

R/W

0x0D00

Module 5 Interrupt Vector 1 - BIT

R/W

0x0D04

Module 5 Interrupt Vector 2 - Open

R/W

0x0D08

Module 5 Interrupt Vector 3 - Temperature Alert Low 1

R/W

0x0D0C

Module 5 Interrupt Vector 4 - Temperature Alert Low 2

R/W

0x0D10

Module 5 Interrupt Vector 5 - Temperature Alert High 1

R/W

0x0D14

Module 5 Interrupt Vector 6 - Temperature Alert High 2

R/W

0x0D18-0x0D64

Module 5 Interrupt Vector 7-26 - Reserved

R/W

0x0D68

Module 5 Interrupt Vector 27 - Summary

R/W

0x0D6C-0x0D7C

Module 5 Interrupt Vector 28-32 - Reserved

R/W

0x0E00

Module 5 Interrupt Steering 1 - BIT

R/W

0x0E04

Module 5 Interrupt Steering 2 - Open

R/W

0x0E08

Module 5 Interrupt Steering 3 - Temperature Alert Low 1

R/W

0x0E0C

Module 5 Interrupt Steering 4 - Temperature Alert Low 2

R/W

0x0E10

Module 5 Interrupt Steering 5 - Temperature Alert High 1

R/W

0x0E14

Module 5 Interrupt Steering 6 - Temperature Alert High 2

R/W

0x0E18-0x0E64

Module 5 Interrupt Steering 7-26 - Reserved

R/W

0x0E68

Module 5 Interrupt Steering 27 - Summary

R/W

0x0E6C-0x0E7C

Module 5 Interrupt Steering 28-32 - Reserved

R/W

0x0F00

Module 6 Interrupt Vector 1 - BIT

R/W

0x0F04

Module 6 Interrupt Vector 2 - Open

R/W

0x0F08

Module 6 Interrupt Vector 3 - Temperature Alert Low 1

R/W

0x0F0C

Module 6 Interrupt Vector 4 - Temperature Alert Low 2

R/W

0x0F10

Module 6 Interrupt Vector 5 - Temperature Alert High 1

R/W

0x0F14

Module 6 Interrupt Vector 6 - Temperature Alert High 2

R/W

0x0F18-0x0F64

Module 6 Interrupt Vector 7-26 - Reserved

R/W

0x0F68

Module 6 Interrupt Vector 27 - Summary

R/W

0x0F6C-0x0F7C

Module 6 Interrupt Vector 28-32 - Reserved

R/W

0x1000

Module 6 Interrupt Steering 1 - BIT

R/W

0x1004

Module 6 Interrupt Steering 2 - Open

R/W

0x1008

Module 6 Interrupt Steering 3 - Temperature Alert Low 1

R/W

0x100C

Module 6 Interrupt Steering 4 - Temperature Alert Low 2

R/W

0x1010

Module 6 Interrupt Steering 5 - Temperature Alert High 1

R/W

0x1014

Module 6 Interrupt Steering 6 - Temperature Alert High 2

R/W

0x1018-0x1064

Module 6 Interrupt Steering 7-26 - Reserved

R/W

0x1068

Module 6 Interrupt Steering 27 - Summary

R/W

0x106C-0x107C

Module 6 Interrupt Steering 28-32 - Reserved

R/W

APPENDIX: PIN-OUT DETAILS

Pin-out details (for reference) are shown below, with respect to DATAIO. Additional information on pin-outs can be found in the Motherboard Operational Manuals.

Module Signal

(Ref Only)

RTD

(RT1)

DATIO1

SENSE+_CH1

DATIO2

SENSE-_CH1

DATIO3

DRIVE+_CH1

DATIO4

DRIVE-_CH1

DATIO5

DRIVE+_CH2

DATIO6

DRIVE-_CH2

DATIO7

SENSE+_CH2

DATIO8

SENSE-_CH2

DATIO9

SENSE+_CH3

DATIO10

SENSE-_CH3

DATIO11

DRIVE+_CH3

DATIO12

DRIVE-_CH3

DATIO13

SENSE+_CH5

DATIO14

SENSE-_CH5

DATIO15

DRIVE+_CH5

DATIO16

DRIVE-_CH5

DATIO17

DRIVE+_CH6

DATIO18

DRIVE-_CH6

DATIO19

SENSE+_CH6

DATIO20

SENSE-_CH6

DATIO21

SENSE+_CH7

DATIO22

SENSE-_CH7

DATIO23

DRIVE+_CH7

DATIO24

DRIVE-_CH7

DATIO25

DRIVE+_CH4

DATIO26

DRIVE-_CH4

DATIO27

SENSE+_CH4

DATIO28

SENSE-_CH4

DATIO29

DRIVE+_CH8

DATIO30

DRIVE-_CH8

DATIO31

SENSE+_CH8

DATIO32

SENSE-_CH8

DATIO33

DATIO34

DATIO35

DATIO36

DATIO37

DATIO38

DATIO39

DATIO40

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

0x0

Read Latched Register

0x0

Read Latched Register

0x0

0x1

Read Latched Register

0x1

Write 0x1 to Latched Register

0x0

0x1

0x0

0x1

Read Latched Register

0x0

Read Latched Register

0x1

Write 0x1 to Latched Register

0x0

0x2

0x3

Read Latched Register

0x2

Read Latched Register

0x2

Write 0x2 to Latched Register

0x0

0x2

0x2

0x3

Read Latched Register

0x1

Read Latched Register

0x3

Write 0x1 to Latched Register

Write 0x3 to Latched Register

0x0

0x2

0xC

0xF

Read Latched Register

0xC

Read Latched Register

0xE

Write 0xC to Latched Register

Write 0xE to Latched Register

0x0

0xC

0xC

0xF

Read Latched Register

0x0

Read Latched

0xC

Write 0xC to Latched Register

0xC

0x4

0xF

Read Latched Register

0x0

Read Latched Register

0xC

Write 0xC to Latched Register

0x4

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

MODULE COMMON REGISTERS

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The registers described in this document are common to all NAI Generation 5 modules.

Module Information Registers

The registers in this section provide module information such as firmware revisions, capabilities and unique serial number information.

FPGA Version Registers

The FPGA firmware version registers include registers that contain the Revision, Compile Timestamp, SerDes Revision, Template Revision and Zynq Block Revision information.

FPGA Revision

Function: FPGA firmware revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the revision of the board’s FPGA

Operational Settings: The upper 16-bits are the major revision and the lower 16-bits are the minor revision.

Table 1. FPGA Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

FPGA Compile Timestamp

Function: Compile Timestamp for the FPGA firmware.

Type: unsigned binary word (32-bit)

Data Range: N/A

Read/Write: R

Initialized Value: Value corresponding to the compile timestamp of the board’s FPGA

Operational Settings: The 32-bit value represents the Day, Month, Year, Hour, Minutes and Seconds as formatted in the table:

Table 2. FPGA Compile Timestamp
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
day (5-bits)					month (4-bits)				year (6-bits)						hr
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
hour (5-bits)				minutes (6-bits)						seconds (6-bits)

FPGA SerDes Revision

Function: FPGA SerDes revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the SerDes revision of the board’s FPGA

Operational Settings: The upper 16-bits are the major revision, and the lower 16-bits are the minor revision.

Table 3. FPGA SerDes Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

FPGA Template Revision

Function: FPGA Template revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the template revision of the board’s FPGA

Operational Settings: The upper 16-bits are the major revision, and the lower 16-bits are the minor revision.

Table 4. FPGA Template Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

FPGA Zynq Block Revision

Function: FPGA Zynq Block revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the Zynq block revision of the board’s FPGA

Operational Settings: The upper 16-bits are the major revision, and the lower 16-bits are the minor revision.

Table 5. FPGA Zynq Block Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

Bare Metal Version Registers

The Bare Metal firmware version registers include registers that contain the Revision and Compile Time information.

Bare Metal Revision

Function: Bare Metal firmware revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the revision of the board’s Bare Metal

Operational Settings: The upper 16-bits are the major revision and the lower 16-bits are the minor revision.

Table 6. Bare Metal Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

Bare Metal Compile Time

Function: Provides an ASCII representation of the Date/Time for the Bare Metal compile time.

Type: 24-character ASCII string - Six (6) unsigned binary word (32-bit)

Data Range: N/A

Read/Write: R

Initialized Value: Value corresponding to the ASCII representation of the compile time of the board’s Bare Metal

Operational Settings: The six 32-bit words provide an ASCII representation of the Date/Time. The hexadecimal values in the field below represent: May 17 2019 at 15:38:32

Table 7. Bare Metal Compile Time (Note: little-endian order of ASCII values)
Word 1 (Ex. 0x2079614D)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Space (0x20)								Month ('y' - 0x79)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Month ('a' - 0x61)								Month ('M' - 0x4D)
Word 2 (Ex. 0x32203731)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Year ('2' - 0x32)								Space (0x20)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Day ('7' - 0x37)								Day ('1' - 0x31)
Word 3 (Ex. 0x20393130)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Space (0x20)								Year ('9' - 0x39)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Year ('1' - 0x31)								Year ('0' - 0x30)
Word 4 (Ex. 0x31207461)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Hour ('1' - 0x31)								Space (0x20)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
'a' (0x74)								't' (0x61)
Word 5 (Ex. 0x38333A35)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Minute ('8' - 0x38)								Minute ('3' - 0x33)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
':' (0x3A)								Hour ('5' - 0x35)
Word 6 (Ex. 0x0032333A)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
NULL (0x00)								Seconds ('2' - 0x32)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Seconds ('3' - 0x33)								':' (0x3A)

FSBL Version Registers

The FSBL version registers include registers that contain the Revision and Compile Time information for the First Stage Boot Loader (FSBL).

FSBL Revision

Function: FSBL firmware revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the revision of the board’s FSBL

Operational Settings: The upper 16-bits are the major revision, and the lower 16-bits are the minor revision.

Table 8. FSBL Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

FSBL Compile Time

Function: Provides an ASCII representation of the Date/Time for the FSBL compile time.

Type: 24-character ASCII string - Six (6) unsigned binary word (32-bit)

Data Range: N/A

Read/Write: R

Initialized Value: Value corresponding to the ASCII representation of the Compile Time of the board’s FSBL

Operational Settings: The six 32-bit words provide an ASCII representation of the Date/Time.

The hexadecimal values in the field below represent: May 17 2019 at 15:38:32

Table 9. FSBL Compile Time (Note: little-endian order of ASCII values)
Word 1 (Ex. 0x2079614D)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Space (0x20)								Month ('y' - 0x79)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Month ('a' - 0x61)								Month ('M' - 0x4D)
Word 2 (Ex. 0x32203731)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Year ('2' - 0x32)								Space (0x20)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Day ('7' - 0x37)								Day ('1' - 0x31)
Word 3 (Ex. 0x20393130)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Space (0x20)								Year ('9' - 0x39)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Year ('1' - 0x31)								Year ('0' - 0x30)
Word 4 (Ex. 0x31207461)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Hour ('1' - 0x31)								Space (0x20)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
'a' (0x74)								't' (0x61)
Word 5 (Ex. 0x38333A35)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Minute ('8' - 0x38)								Minute ('3' - 0x33)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
':' (0x3A)								Hour ('5' - 0x35)
Word 6 (Ex. 0x0032333A)
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
NULL (0x00)								Seconds ('2' - 0x32)
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Seconds ('3' - 0x33)								':' (0x3A)

Module Serial Number Registers

The Module Serial Number registers include registers that contain the Serial Numbers for the Interface Board and the Functional Board of the module.

Interface Board Serial Number

Function: Unique 128-bit identifier used to identify the interface board.

Type: 16-character ASCII string - Four (4) unsigned binary words (32-bit)

Data Range: N/A

Read/Write: R

Initialized Value: Serial number of the interface board

Operational Settings: This register is for information purposes only.

Functional Board Serial Number

Function: Unique 128-bit identifier used to identify the functional board.

Type: 16-character ASCII string - Four (4) unsigned binary words (32-bit)

Data Range: N/A

Read/Write: R

Initialized Value: Serial number of the functional board

Operational Settings: This register is for information purposes only.

Module Capability

Function: Provides indication for whether or not the module can support the following: SerDes block reads, SerDes FIFO block reads, SerDes packing (combining two 16-bit values into one 32-bit value) and floating point representation. The purpose for block access and packing is to improve the performance of accessing larger amounts of data over the SerDes interface.

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0x0000 0107

Read/Write: R

Initialized Value: 0x0000 0103

Operational Settings: A “1” in the bit associated with the capability indicates that it is supported.

Table 10. Module Capability
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	Flt-Pt	0	0	0	0	0	Pack	FIFO Blk	Blk

Module Memory Map Revision

Function: Module Memory Map revision

Type: unsigned binary word (32-bit)

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Value corresponding to the Module Memory Map Revision

Operational Settings: The upper 16-bits are the major revision and the lower 16-bits are the minor revision.

Table 11. Module Memory Map Revision
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Major Revision Number
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Minor Revision Number

Module Measurement Registers

The registers in this section provide module temperature measurement information.

Temperature Readings Registers

The temperature registers provide the current, maximum (from power-up) and minimum (from power-up) Zynq and PCB temperatures.

Interface Board Current Temperature

Function: Measured PCB and Zynq Core temperatures on Interface Board.

Type: signed byte (8-bits) for PCB and signed byte (8-bits) for Zynq core temperatures

Data Range: 0x0000 0000 to 0x0000 FFFF

Read/Write: R

Initialized Value: Value corresponding to the measured PCB and Zynq core temperatures based on the table below

Operational Settings: The upper 16-bits are not used, and the lower 16-bits are the PCB and Zynq Core Temperatures. For example, if the register contains the value 0x0000 202C, this represents PCB Temperature = 32° Celsius and Zynq Temperature = 44° Celsius.

Table 12. Interface Board Current Temperature
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
PCB Temperature								Zynq Core Temperature

Functional Board Current Temperature

Function: Measured PCB temperature on Functional Board.

Type: signed byte (8-bits) for PCB

Data Range: 0x0000 0000 to 0x0000 00FF

Read/Write: R

Initialized Value: Value corresponding to the measured PCB on the table below

Operational Settings: The upper 24-bits are not used, and the lower 8-bits are the PCB Temperature. For example, if the register contains the value 0x0000 0019, this represents PCB Temperature = 25° Celsius.

Table 13. Functional Board Current Temperature
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	PCB Temperature

Interface Board Maximum Temperature

Function: Maximum PCB and Zynq Core temperatures on Interface Board since power-on.

Type: signed byte (8-bits) for PCB and signed byte (8-bits) for Zynq core temperatures

Data Range: 0x0000 0000 to 0x0000 FFFF

Read/Write: R

Initialized Value: Value corresponding to the maximum measured PCB and Zynq core temperatures since power-on based on the table below

Operational Settings: The upper 16-bits are not used, and the lower 16-bits are the maximum PCB and Zynq Core Temperatures. For example, if the register contains the value 0x0000 5569, this represents maximum PCB Temperature = 85° Celsius and maximum Zynq Temperature = 105° Celsius.

Table 14. Interface Board Maximum Temperature
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
PCB Temperature								Zynq Core Temperature

Interface Board Minimum Temperature

Function: Minimum PCB and Zynq Core temperatures on Interface Board since power-on.

Type: signed byte (8-bits) for PCB and signed byte (8-bits) for Zynq core temperatures

Data Range: 0x0000 0000 to 0x0000 FFFF

Read/Write: R

Initialized Value: Value corresponding to the minimum measured PCB and Zynq core temperatures since power-on based on the table below

Operational Settings: The upper 16-bits are not used, and the lower 16-bits are the minimum PCB and Zynq Core Temperatures. For example, if the register contains the value 0x0000 D8E7, this represents minimum PCB Temperature = -40° Celsius and minimum Zynq Temperature = -25° Celsius.

Table 15. Interface Board Minimum Temperature
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
PCB Temperature								Zynq Core Temperature

Functional Board Maximum Temperature

Function: Maximum PCB temperature on Functional Board since power-on.

Type: signed byte (8-bits) for PCB

Data Range: 0x0000 0000 to 0x0000 00FF

Read/Write: R

Initialized Value: Value corresponding to the measured PCB on the table below

Operational Settings: The upper 24-bits are not used, and the lower 8-bits are the PCB Temperature. For example, if the register contains the value 0x0000 0055, this represents PCB Temperature = 85° Celsius.

Table 16. Functional Board Maximum Temperature
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	PCB Temperature

Functional Board Minimum Temperature

Function: Minimum PCB temperature on Functional Board since power-on.

Type: signed byte (8-bits) for PCB

Data Range: 0x0000 0000 to 0x0000 00FF

Read/Write: R

Initialized Value: Value corresponding to the measured PCB on the table below

Operational Settings: The upper 24-bits are not used, and the lower 8-bits are the PCB Temperature. For example, if the register contains the value 0x0000 00D8, this represents PCB Temperature = -40° Celsius.

Table 17. Functional Board Minimum Temperature
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	PCB Temperature

Higher Precision Temperature Readings Registers

These registers provide higher precision readings of the current Zynq and PCB temperatures.

Higher Precision Zynq Core Temperature

Function: Higher precision measured Zynq Core temperature on Interface Board.

Type: signed word (16-bits) for integer part and unsigned word (16-bits) for fractional part

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Measured Zynq Core temperature on Interface Board

Operational Settings: The upper 16-bits represent the signed integer part of the temperature and the lower 16-bits represent the fractional part of the temperature with the resolution of 1/1000 of degree Celsius. For example, if the register contains the value 0x002B 0271, this represents Zynq Core Temperature = 43.625° Celsius, and value 0xFFF6 0177 represents -10.375° Celsius.

Table 18. Higher Precision Zynq Core Temperature
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Signed Integer Part of Temperature
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Fractional Part of Temperature

Higher Precision Interface PCB Temperature

Function: Higher precision measured Interface PCB temperature.

Type: signed word (16-bits) for integer part and unsigned word (16-bits) for fractional part

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Measured Interface PCB temperature

Operational Settings: The upper 16-bits represent the signed integer part of the temperature and the lower 16-bits represent the fractional part of the temperature with the resolution of 1/1000 of degree Celsius. For example, if the register contains the value 0x0020 007D, this represents Interface PCB Temperature = 32.125° Celsius, and value 0xFFE8 036B represents -24.875° Celsius.

Table 19. Higher Precision Interface PCB Temperature
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Signed Integer Part of Temperature
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Fractional Part of Temperature

Higher Precision Functional PCB Temperature

Function: Higher precision measured Functional PCB temperature.

Type: signed word (16-bits) for integer part and unsigned word (16-bits) for fractional part

Data Range: 0x0000 0000 to 0xFFFF FFFF

Read/Write: R

Initialized Value: Measured Functional PCB temperature

Operational Settings: The upper 16-bits represent the signed integer part of the temperature and the lower 16-bits represent the fractional part of the temperature with the resolution of 1/100 of degree Celsius. For example, if the register contains the value 0x0018 004B, this represents Functional PCB Temperature = 24.75° Celsius, and value 0xFFD9 0019 represents -39.25° Celsius.

Table 20. Higher Precision Functional PCB Temperature
D31	D30	D29	D28	D27	D26	D25	D24	D23	D22	D21	D20	D19	D18	D17	D16
Signed Integer Part of Temperature
D15	D14	D13	D12	D11	D10	D9	D8	D7	D6	D5	D4	D3	D2	D1	D0
Fractional Part of Temperature

Module Health Monitoring Registers

The registers in this section provide module temperature measurement information. If the temperature measurements reaches the Lower Critical or Upper Critical conditions, the module will automatically reset itself to prevent damage to the hardware.

Module Sensor Summary Status

Function: The corresponding sensor bit is set if the sensor has crossed any of its thresholds.

Type: unsigned binary word (32-bits)

Data Range: See table below

Read/Write: R

Initialized Value: 0

Operational Settings: This register provides a summary for module sensors. When the corresponding sensor bit is set, the Sensor Threshold Status register for that sensor will indicate the threshold condition that triggered the event.

Table 21. Module Sensor Summary Status
Bit(s)	Sensor
D31:D6	Reserved
D5	Functional Board PCB Temperature
D4	Interface Board PCB Temperature
D3:D0	Reserved

Module Sensor Registers

The registers listed in this section apply to each module sensor listed for the Module Sensor Summary Status register. Each individual sensor register provides a group of registers for monitoring module temperatures readings. From these registers, a user can read the current temperature of the sensor in addition to the minimum and maximum temperature readings since power-up. Upper and lower critical/warning temperature thresholds can be set and monitored from these registers. When a programmed temperature threshold is crossed, the Sensor Threshold Status register will set the corresponding bit for that threshold. The figure below shows the functionality of this group of registers when accessing the Interface Board PCB Temperature sensor as an example.

Sensor Threshold Status

Function: Reflects which threshold has been crossed

Type: unsigned binary word (32-bits)

Data Range: See table below

Read/Write: R

Initialized Value: 0

Operational Settings: The associated bit is set when the sensor reading exceed the corresponding threshold settings.

Table 22. Sensor Threshold Status
Bit(s)	Description
D31:D4	Reserved
D3	Exceeded Upper Critical Threshold
D2	Exceeded Upper Warning Threshold
D1	Exceeded Lower Critical Threshold
D0	Exceeded Lower Warning Threshold

Sensor Current Reading

Function: Reflects current reading of temperature sensor

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R

Initialized Value: N/A

Operational Settings: The register represents current sensor reading as a single precision floating point value. For example, for a temperature sensor, register value 0x41C6 0000 represents temperature = 24.75° Celsius.

Sensor Minimum Reading

Function: Reflects minimum value of temperature sensor since power up

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R

Initialized Value: N/A

Operational Settings: The register represents minimum sensor value as a single precision floating point value. For example, for a temperature sensor, register value 0x41C6 0000 represents temperature = 24.75° Celsius.

Sensor Maximum Reading

Function: Reflects maximum value of temperature sensor since power up

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R

Initialized Value: N/A

Operational Settings: The register represents maximum sensor value as a single precision floating point value. For example, for a temperature sensor, register value 0x41C6 0000 represents temperature = 24.75° Celsius.

Sensor Lower Warning Threshold

Function: Reflects lower warning threshold of temperature sensor

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R/W

Initialized Value: Default lower warning threshold (value dependent on specific sensor)

Operational Settings: The register represents sensor lower warning threshold as a single precision floating point value. For example, for a temperature sensor, register value 0xC220 0000 represents temperature = -40.0° Celsius.

Sensor Lower Critical Threshold

Function: Reflects lower critical threshold of temperature sensor

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R/W

Initialized Value: Default lower critical threshold (value dependent on specific sensor)

Operational Settings: The register represents sensor lower critical threshold as a single precision floating point value. For example, for a temperature sensor, register value 0xC25C 0000 represents temperature = -55.0° Celsius.

Sensor Upper Warning Threshold

Function: Reflects upper warning threshold of temperature sensor

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R/W

Initialized Value: Default upper warning threshold (value dependent on specific sensor)

Operational Settings: The register represents sensor upper warning threshold as a single precision floating point value. For example, for a temperature sensor, register value 0x42AA 0000 represents temperature = 85.0° Celsius.

Sensor Upper Critical Threshold

Function: Reflects upper critical threshold of temperature sensor

Type: Single Precision Floating Point Value (IEEE-754)

Data Range: Single Precision Floating Point Value (IEEE-754)

Read/Write: R/W

Initialized Value: Default upper critical threshold (value dependent on specific sensor)

Operational Settings: The register represents sensor upper critical threshold as a single precision floating point value. For example, for a temperature sensor, register value 0x42FA 0000 represents temperature = 125.0° Celsius.

FUNCTION REGISTER MAP

Key

Bold Underline

= Measurement/Status/Board Information

Bold Italic

= Configuration/Control

Module Information Registers

0x003C

FPGA Revision

0x0030

FPGA Compile Timestamp

0x0034

FPGA SerDes Revision

0x0038

FPGA Template Revision

0x0040

FPGA Zynq Block Revision

0x0074

Bare Metal Revision

0x0080

Bare Metal Compile Time (Bit 0-31)

0x0084

Bare Metal Compile Time (Bit 32-63)

0x0088

Bare Metal Compile Time (Bit 64-95)

0x008C

Bare Metal Compile Time (Bit 96-127)

0x0090

Bare Metal Compile Time (Bit 128-159)

0x0094

Bare Metal Compile Time (Bit 160-191)

0x007C

FSBL Revision

0x00B0

FSBL Compile Time (Bit 0-31)

0x00B4

FSBL Compile Time (Bit 32-63)

0x00B8

FSBL Compile Time (Bit 64-95)

0x00BC

FSBL Compile Time (Bit 96-127)

0x00C0

FSBL Compile Time (Bit 128-159)

0x00C4

FSBL Compile Time (Bit 160-191)

0x0000

Interface Board Serial Number (Bit 0-31)

0x0004

Interface Board Serial Number (Bit 32-63)

0x0008

Interface Board Serial Number (Bit 64-95)

0x000C

Interface Board Serial Number (Bit 96-127)

0x0010

Functional Board Serial Number (Bit 0-31)

0x0014

Functional Board Serial Number (Bit 32-63)

0x0018

Functional Board Serial Number (Bit 64-95)

0x001C

Functional Board Serial Number (Bit 96-127)

0x0070

Module Capability

0x01FC

Module Memory Map Revision

Module Measurement Registers

0x0200

Interface Board PCB/Zynq Current Temperature

0x0208

Functional Board PCB Current Temperature

0x0218

Interface Board PCB/Zynq Max Temperature

0x0228

Interface Board PCB/Zynq Min Temperature

0x0218

Functional Board PCB Max Temperature

0x0228

Functional Board PCB Min Temperature

0x02C0

Higher Precision Zynq Core Temperature

0x02C4

Higher Precision Interface PCB Temperature

0x02E0

Higher Precision Functional PCB Temperature

Module Health Monitoring Registers

0x07F8

Module Sensor Summary Status

Revision History

Module Manual - RT1 Revision History

Revision

Revision Date

Description

2022-09-15

ECO C09637, transition to docbuilder format. Replaced "Specifications" with "Data Sheet". Pg.6,

added Pt2000 to RTD interface & excitation specs. Pg.6, changed 4-wire accuracy to 0.1%. Pg.6,

changed Update Rate to Sample Rate; updated spec. Pg.6, changed Power to 450 mA. Pg.7,

removed (default) from 'four-wire mode' in Introduction. Pg.7, added Pt2000 range & excitation

current source. Pg.8, added 3-wire mode excitation current description. Pg.8, added Temp

Threshold Detect & Status and Interrupts. Pg.10, changed Update Rate to Sample Rate. Pg.11,

added Pt2000 to RTD Type. Pg.12, added Suspend Background Maintenance Operations Register

sub-section. Pg.16, added Summary Status. Pg.18, changed Update Rate to Sample Rate. Pg.19,

added Suspend Background Maintenance Operations/Run Open-Line/Run BIT offsets. Pg.21,

added Summary Status offsets. Pg.22-24, added Interrupt Registers offsets.

2023-11-16

ECO C10974, pg.7, updated Introduction; added RT1 Overview. Pg.9/15/21, added module

common registers. Pg.12, added note to 2-Wire Lead Resistance Compensation. Pg.17, removed

summary events table.

Module Manual - Status and Interrupts Revision History

Revision

Revision Date

Description

2021-11-30

C08896; Transition manual to docbuilder format - no technical info change.

Module Manual - Module Common Registers Revision History

Revision

Revision Date

Description

2023-08-11

ECO C10649, initial release of module common registers manual.

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