68RTARM4 Data Sheet

FUNCTION/FEATURES

• OpenVPX 1.0” pitch rear chassis I/O panel with IEEE 1101.10/11, Type IV, Injector/Ejector handle
• Optimized for NAI 68ARM4 SBC boards
• Industry standard commercial connectors, where applicable
• High density inboard connector provides function module I/O
• Standard NAI Mini DisplayPort interface receptacle (for HDMI or DDP video); mDP-to-DP-to-Terminal Adapter for 68ARM4 (for optional I2C & GPIO)

DESCRIPTION

The 68RTARM4-1 is the generic base product nomenclature for the SOSA™-aligned 3U OpenVPX Rear I/O Transition Module (RTM) specifically optimized for the 68ARM4 (68RTARM4-1) SBC module (board). The 68RTARM4-1 is for use in OpenVPX systems/chassis with RTM accessibility that require reliable interconnection between the rear I/O P1 & P2 OpenVPX connectors and the ‘outside world’.

SPECIFICATIONS

Operating Temperature:	0°C to 70°C (typical usage, contact factory for extended temperature range)
Storage Temperature:	-40°C to 85°C
Humidity:	95% RH, non-condensing
Protective Covering:	Both sides of the board are protected/covered with solder mask (Conformal coat available on special order – Contact Factory)
I/O Connector Configuration:	One panel mini DisplayPort receptacle for HDMI/DDP video (J2) One mini DisplayPort-to-DisplayPort-to-Terminal adapter for I2C & GPIO (J2) Two panel USB-3-A receptacles, stacked, for USB Port 1 & Port 2 (J3) Two inboard function module 44-pin NAI-XMC I/O Header (J5, J7) One inboard 1-pin header, SYS GND Reference point (JP4) One inboard 2-pin header, jumper, NVMRO (JP5) One inboard 2-pin header for RTC_STDBY, external or 3.3V battery select (JP6) One inboard 2-pin header, jumper, MRSTn (JP8) Two inboard 3-pin socket, SER (JP9, JP10) One inboard 5-pin header, jumper, TTL_CH1-4/GDiscrete (JP11) One panel mini-HDMI-type C receptacle for GbE (ETH2) and RS-232 console port (JP19)
Size:	3U (100 mm H x 80 mm D) / 1” 5HP pitch width (25.4 mm W)
Weight:	5 oz. (142 g) (approx.)

68RTARM4-1 INSTALLATION

Note

For reference only.

68RTARM4-1 CONNECTOR/PIN-OUT INFORMATION

I/O Connectors

User and defined I/O is available through panel mounted and inboard header connectors via the VPX RP0, RP1 & RP2 user defined rear I/O backplane connectors. The 68RTARM4-1 RTM is intended for use with the 68ARM4 (68RTARM4-1) SOSA™-aligned 3U OpenVPX SBC I/O card with specific pinout references. Please reference additional information and documentation from the respective 68ARM4 board web product page.

Caution

Do not connect to any undesignated or n/c pins.

Note

The following notes apply unless otherwise specified:

1. Maximum ratings for the VPX MultiGig-RT2 type rear I/O connectors are as follows (per TE connectivity 108-2072, Rev F):
       • Operating Voltage: 166 volts AC peak or DC
       • Current: Signal Wafers: 1.5 ampere at <30°C (Single circuit, free air)
2. This document provides signal names for reference only and may be referring to the 68ARM4 base product with the “-N” XMC module or are specific to the 68RTARM4.

RTM Panel Connector System Ground Pins

None. See specific connector, header or receptacle pin out.

RTM Panel Connector Chassis Grounding Pins

Panel: No dedicated chassis GND pins available.
After installing and securing withing a VPX chassis, connect the panel itself, rear VPX connector key guides, and the panel receptacle shell to the chassis.

RTM CONNECTORS POSITIONING AND LAYOUT

Note

For reference only.

RTM DEFINED I/O PIN-OUTS

RTM VPX RP0 I/O Definition

	Row	Row	Row	Row	Row	Row	Row
RP0	A	B	C	D	E	F	G
1	n/c	n/c	n/c	n/c	n/c	n/c	n/c
2	n/c	n/c	n/c	n/c	n/c	n/c	n/c
3	n/c	n/c	n/c	n/c	n/c	n/c	n/c
4	NVMRO	P0_SYSRST#	GND	n/c	GND	n/c	n/c
5	n/c	n/c	GND	+3V3_AUX	GND	n/c	n/c
6	n/c	n/c	GND	n/c	GND	n/c	n/c
7	n/c	n/c	n/c	n/c	n/c	GND	n/c
8	GND	n/c	n/c	GND	n/c	n/c	GND
9	n/c	n/c	GND	n/c	n/c	GND	GDISCRETE1
10	GND	n/c	n/c	GND	n/c	n/c	GND
11	n/c	n/c	GND	n/c	n/c	GND	RTC_STDBY
12	GND	n/c	n/c	GND	n/c	n/c	GND
13	n/c	n/c	GND	n/c	n/c	GND	n/c
14	GND	n/c	n/c	GND	n/c	n/c	GND
15	n/c	n/c	GND	n/c	n/c	GND	+5V_USB1
16	GND	n/c	n/c	GND	n/c	n/c	GND

KEY

	= Maintenance
	= USB1 (3.0 capable)

RTM VPX RP1 I/O Definition

	Row	Row	Row	Row	Row	Row	Row
RP1	A	B	C	D	E	F	G
1	MOD1_DATIO4	MOD1_DATIO3	GND	MOD1_DATIO2	MOD1_DATIO1	GND	SER_TXD
2	GND	MOD1_DATIO8	MOD1_DATIO7	GND	MOD1_DATIO6	MOD1_DATIO5	GND
3	MOD1_DATIO12	MOD1_DATIO11	GND	MOD1_DATIO10	MOD1_DATIO9	GND	SER_RXD
4	GND	MOD1_DATIO16	MOD1_DATIO15	GND	MOD1_DATIO14	MOD1_DATIO13	GND
5	MOD1_DATIO20	MOD1_DATIO19	GND	MOD1_DATIO18	MOD1_DATIO17	GND	TTL-CH1
6	GND	MOD1_DATIO24	MOD1_DATIO23	GND	MOD1_DATIO22	MOD1_DATIO21	GND
7	n/c	n/c	GND	n/c	n/c	GND	n/c (MRSTn)
8	GND	n/c	n/c	GND	n/c	n/c	GND
9	DDP_B0_D_P	DDP_B0_D_N	GND	DDP_B1_D_P	DDP_B1_D_N	GND	n/c (SER_TXD0)
	TTL-CH5	TTL-CH6		n/c	n/c
10	GND	DDP_B2_D_P	DDP_B2_D_N	GND	DDP_B3_D_P	DDP_B3_D_N	GND
		n/c	n/c	GND	n/c	n/c	GND
11	HDMI_SCL_AUXP	HDMI_SDA_AUXN	GND	HDMI_HPD	+V5S_VIDEO	GND	n/c (SER_TXD2)
	I2C-DATA	I2C-CLOCK		TTL-CH7	TTL-CH8
12	GND	USB1_P	USB1_N	GND	USB2_P	USB2_N	GND
13	USB1_SSRX_P	USB1_SSRX_N	GND	USB1_SSTX_P	USB1_SSTX_N	GND	n/c (SER_RXD0)
14	GND	n/c	n/c	GND	n/c	n/c	GND
15	ETH2_TP0_P	ETH2_TP0_N	GND	ETH2_TP1_P	ETH2_TP1_N	GND	n/c (SER_RXD2)
16	GND	ETH2_TP2_P	ETH2_TP2_N	GND	ETH2_TP3_P	ETH2_TP3_N	GND

KEY

	= USB1 (3.0 capable)		= DisplayPort (default)
	= USB2 (2.0)		= TTL
	= MODULE (2) Standard I/O		= I2C (68ARM4 w/Adapter)
	= Ethernet 2		= GPIO (TTL - 68ARM4 w/Adapter)

RTM VPX RP2 I/O Definition

	Row	Row	Row	Row	Row	Row	Row
RP2	A	B	C	D	E	F	G
1	MOD2_DATIO12	MOD2_DATIO11	GND	MOD2_DATIO6	MOD2_DATIO5	GND	+5V_USB2
2	GND	MOD2_DATIO30	MOD2_DATIO29	GND	MOD2_DATIO18	MOD2_DATIO17	GND
3	MOD2_DATIO22	MOD2_DATIO21	GND	MOD2_DATIO20	MOD2_DATIO19	GND	TTL_CH2
4	GND	MOD2_DATIO32	MOD2_DATIO31	GND	MOD2_DATIO24	MOD2_DATIO23	GND
5	MOD2_DATIO4	MOD2_DATIO3	GND	MOD2_DATIO2	MOD2_DATIO1	GND	TTL_CH3
6	GND	MOD2_DATIO26	MOD2_DATIO25	GND	MOD2_DATIO14	MOD2_DATIO13	GND
7	MOD2_DATIO10	MOD2_DATIO9	GND	MOD2_DATIO8	MOD2_DATIO7	GND	TTL_CH4
8	GND	MOD2_DATIO28	MOD2_DATIO27	GND	MOD2_DATIO16	MOD2_DATIO15	GND

KEY

	= MODULE (2) Standard I/O
	= USB2 (2.0)
	= TTL

J2, DisplayPort / Breakout Cable Adapter

One panel mini DisplayPort receptacle for HDMI/DDP video (J2)
MFG: E9320-001-01, Pulse (or equivalent)

One mini DisplayPort-to-DisplayPort-to-Terminal adapter for I2C & GPIO (J2)
MFG: TBD, TBD (or equivalent)

68RTARM4-1 J2 Mini-DisplayPort Video

VPX RP	68INT6/Generic Signal (REF)	RTM mDP J2	68ARM4 Signal	mDP-to- DB9 Adapter
	GND	1
RP1-D11	HDMI_HPD	2	GPIO7 (68ARM4: RN26-IN)	8
RP1-A09	DDP_B0_D_P	3	GPIO5 (68ARM4: RN26-IN)	6
	n/c	4
RP1-B09	DDP_B0_D_N	5	GPIO6 (68ARM4: RN26-IN)	7
	n/c	6
	GND	7
	GND	8
RP1-D09	DDP_B1_D_P	9
RP1-E10	DDP_B3_D_P	10
RP1-E09	DDP_B1_D_N	11
RP1-F10	DDP_B3_D_N	12
	GND	13
	GND	14		5
RP1-B10	DDP_B2_D_P	15
RP1-A11	HDMI_SCL_AUXP	16	I2C_CLK (68ARM4: RN70-IN)	2
RP1-C10	DDP_B2_D_N	17
RP1-B11	HDMI_SDA_AUXN	18	I2C_DAT (68ARM4: RN70-IN)	3
	GND	19
RP1-E11	+V5S_VIDEO	20	GPIO8 (68ARM4: RN26-IN)	9

J3, USB

Two panel USB-A receptacles (stacked), for USB Port 1 & Port 2 (J3, A & B)
MFG: GSB311231HR, AMPHENOL; Connector, USB 3.0 STD A Stacked, or equivalent
(2x USB Type A)

68RTARM4-1 J3 USB

VPX RP	Signal (REF)	USB Type-A J3
RP0-G15	+5V_USB1	1
RP1-C12	USB1_N	2
RP1-B12	USB1_P	3
	GND	4
RP1-B13	USB1_SSRX_N	5
RP1-A13	USB1_SSRX_P	6
	GND	7
RP1-E13	USB1_SSTX_N	8
RP1-D13	USB1_SSTX_P	9
RP2-G1	+5V_USB2	10
RP1-F12	USB2_N	11
RP1-E12	USB2_P	12
	GND	13
	n/c	14
	n/c	15
	GND	16
	n/c	17
	n/c	18

KEY

	= USB1 (3.0 capable)
	= USB2 (2.0)

J5 & J7, Inboard Module Function I/O Connector Interfaces

Two inboard 44-pin Header, Module Standard I/O interface (J5, J7)
MFG: M80-5114422, Harwin; CONN, 44Pin, Male, Vertical, 2MM Spacing, or equivalent

68RTARM4-1 J5 (M1) Inboard Module Standard I/O

VPX RP		J5 Inboard I/O			VPX RP
	GND	1	23	GND
RP1-E1	MOD1-DATIO01	2	24	MOD1-DATIO02	RP1-D1
RP1-B1	MOD1-DATIO03	3	25	MOD1-DATIO04	RP1-A1
	n/c	4	26	n/c
RP1-F2	MOD1-DATIO05	5	27	MOD1-DATIO06	RP1-E2
	n/c	6	28	n/c
RP1-C2	MOD1-DATIO07	7	29	MOD1-DATIO08	RP1-B2
RP1-E3	MOD1-DATIO09	8	30	MOD1-DATIO10	RP1-D3
	n/c	9	31	n/c
RP1-B3	MOD1-DATIO11	10	32	MOD1-DATIO12	RP1-A3
	n/c	11	33	n/c
RP1-F4	MOD1-DATIO13	12	34	MOD1-DATIO14	RP1-E4
RP1-C4	MOD1-DATIO15	13	35	MOD1-DATIO16	RP1-B4
	n/c	14	36	n/c
RP1-E5	MOD1-DATIO17	15	37	MOD1-DATIO18	RP1-D5
	n/c	16	38	n/c
RP1-B5	MOD1-DATIO19	17	39	MOD1-DATIO20	RP1-A5
RP1-F6	MOD1-DATIO21	18	40	MOD1-DATIO22	RP1-E6
	n/c	19	41	n/c
RP1-C6	MOD1-DATIO23	20	42	MOD1-DATIO24	RP1-B6
	n/c	21	43	n/c
	n/c	22	44	n/c

68RTARM4-1 J7 (M2) Inboard Module Standard I/O

VPX RP		J7 Inboard I/O			VPX RP
	GND	1	23	GND
RP2-E5	MOD2-DATIO01	2	24	MOD2-DATIO02	RP2-D5
RP2-B5	MOD2-DATIO03	3	25	MOD2-DATIO04	RP2-A5
RP2-C6	MOD2-DATIO25	4	26	MOD2-DATIO26	RP2-B6
RP2-E1	MOD2-DATIO05	5	27	MOD2-DATIO06	RP2-D1
	n/c	6	28	n/c
RP2-E7	MOD2-DATIO07	7	29	MOD2-DATIO08	RP2-D7
RP2-B7	MOD2-DATIO09	8	30	MOD2-DATIO10	RP2-A7
RP2-C8	MOD2-DATIO27	9	31	MOD2-DATIO28	RP2-B8
RP2-B1	MOD2-DATIO11	10	32	MOD2-DATIO12	RP2-A1
	n/c	11	33	n/c
RP2-F6	MOD2-DATIO13	12	34	MOD2-DATIO14	RP2-E6
RP2-F8	MOD2-DATIO15	13	35	MOD2-DATIO16	RP2-E8
RP2-C2	MOD2-DATIO29	14	36	MOD2-DATIO30	RP2-B2
RP2-F2	MOD2-DATIO17	15	37	MOD2-DATIO18	RP2-E2
	n/c	16	38	n/c
RP2-E3	MOD2-DATIO19	17	39	MOD2-DATIO20	RP2-D3
RP2-B3	MOD2-DATIO21	18	40	MOD2-DATIO22	RP2-A3
RP2-C4	MOD2-DATIO31	19	41	MOD2-DATIO32	RP2-B4
RP2-F4	MOD2-DATIO23	20	42	MOD2-DATIO24	RP2-E4
	n/c	21	43	n/c
	n/c	22	44	n/c

JP4, JP5, JP6, & JP8 Ancillary Select jumper/shunts and SYS GND reference point

One inboard 2-pin header, jumper, NVMRO (JP5)
One inboard 2-pin header for RTC_STDBY, external or 3.3V battery select (JP6)
One inboard 2-pin header, jumper, MRSTn (JP8)
MFG: TMS-101-51-T-D (x2), SAMTEC; HDR,1x 2, 0.05”, Vertical, TH or equivalent

BAT1: BR-1225A/HBN, Panasonic; Battery, 3V, 48mAh, Lithium, or equivalent

One inboard 1-pin header, SYS GND Reference point (JP4)
MFG: TSW-101-06-T-S, SAMTEC; CONN, HDR,1X1, .100, VERTICAL, TH

68RTARM4-1 JP5, JP6, JP8 & JP4, Ancillary Select jumper/shunts

VPX RP	Signal (REF)	NVMRO JP5
RP0-A4	NVMRO	1
	GND	2
VPX RP	Signal (REF)	RTC_STDBY JP6
RP0-G11	RTC_STBY	1
	BAT1 @ +3.3V	2
VPX RP	Signal (REF)	NVMRO JP8
RP1-G7	MRSTn	1
	GND	2
	Signal (REF)	SYS GND JP4
	GND	1

NVMRO = Non-volatile memory read only
MRSTn = Master Reset

JP9 & JP10, SER Sockets

Two Serial (SER0 & SER2) 3-pin Sockets (JP9 & JP10)
MFG: SLM-103-01-G-S, Samtec; SOC, 3x1, 1.27 mm Low Profile, Vertical, or equivalent

68RTARM4-1 JP9 & JP10 Serial Interface Sockets

VPX RP	Signal (REF)	SER0 JP9	VPX RP	Signal (REF)	SER2 JP10
RP1-G13	SER_RXD0	1	RP1-G15	SER_RXD2	1
RP1-G9	SER_TXD0	2	RP1-G11	SER_TXD2	2
	GND	3		GND	3

JP11, TTL_CH1-4, GDiscrete Jumper/Header

One inboard 5-pin header, jumper, TTL_CH1-4, GDiscrete (JP11)
MFG: TSM-105-02-T-DV, Samtec; HDR, 5x2, 0.100” spacing, Vertical, SM or equivalent

68RTARM4 JP11, TTL_CH1-4, GDiscrete jumper/header

VPX RP	Signal (REF)	TTL/GDiscrete JP11
RP0-G9	GDISCRETE1	1
	System GND	2
RP1-G5	TTL_CH1	3
	System GND	4
RP2-G3	TTL_CH2	5
	System GND	6
RP2-G5	TTL_CH3	7
	System GND	8
RP2-G7	TTL_CH4	9
	System GND	10

JP19, Mini-HDMI-Type I/O Connectors Pin Mapping

MFG: 685119136923, Wurth (or equivalent)

68RTARM4-1 JP19 Mini-HDMI-Type Receptacle I/O

VPX-RP	Signal (REF)	MINI-HDMI-type JP19
	N/C	1
RP1-A15	ETH2-TP0+	2
RP1-B15	ETH2-TP0-	3
	N/C	4
RP1-D15	ETH2-TP1+	5
RP1-E15	ETH2-TP1-	6
	N/C	7
RP1-B16	ETH2-TP2+	8
RP1-C16	ETH2-TP2-	9
	N/C	10
RP1-E16	ETH2-TP3+	11
RP1-F16	ETH2-TP3-	12
	GND	13
	N/C	14
	N/C	15
	N/C	16
RP1-G1	(SER-RXD)	17
RP1-G3	(SER-TXD)	18
	GND	19

KEY

	= Port 2 / 10/100/1000Base-T (option)
	= Maintenance (reserved)

PART NUMBER DESIGNATION

68RTARM4-X is used/referenced to:

Standard Product Part Number(s): 68RTARM4-X

X	= Configuration Options
1	• Supports standard function module I/O & routing. • J5/J7 = Harwin 44-pin type header
X	= Other than listed; indicates custom configuration – Contact Factory

Specifications are subject to change without notice.

REVISION HISTORY

68RTARM4 Data Sheet Revision History
Revision	Revision Date	Description
A	2026-01-27	ECO C13316, initial release of 68RTARM4 data sheet.

DOCS.NAII REVISIONS

Revision Date	Description
2026-08-24	Updated documentation to docs.naii format.

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