rtd CNV36JXNX User manual

CNV36JXNX cpu/gpuModules™
User’s Manual
BDM-610000090 Revision A
®
www.rtd.com
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CNV36JXNX cpu/gpuModules™ User’s Manual
RTD Document Number: BDM-610000090 Revision A
Copyright © 2009-2022 RTD Embedded Technologies, Inc.All rights reserved.
Trademarks
AdvancedAnalog I/O, Advanced Digital I/O, aAIO, aDIO, a2DIO, Autonomous SmartCal, “Catch the Express”,
cpuModule, dspFramework, dspModule, expressMate, ExpressPlatform, HiDANplus, “MIL Value for COTS
prices”, multiPort, PlatformBus, and PC/104EZ are trademarks, and “Accessing theAnalog World”, dataModule,
IDAN, HiDAN,RTD, and the RTD logo areregistered trademarks ofRTD EmbeddedTechnologies, Inc (formerly
RealTime Devices, Inc.). PS/2 is a trademark of International Business Machines Inc. PCI, PCI Express, and PCIe
are trademarks of PCI-SIG. PC/104, PC/104-Plus, PCI-104, PCIe/104, PCI/104-Express and 104 are trademarks
of the PC/104 Embedded Consortium. All other trademarks appearing in this document are the property of their
respective owners.
Failure to follow the instructions found in this manual may result in damage to the product described in this
manual, or other components of the system. The procedure set forth in this manual shall only be performed by
persons qualified to service electronic equipment. Contents and specifications within this manual are given
without warranty and are subject to change without notice. RTD Embedded Technologies, Inc. shall not be liable
for errors or omissions in this manual, or for any loss, damage, or injury in connection with the use of this manual.
Revision History
Revision
Date
Reason for Change
A
9/7/2021
Initial release

CNV36JXNX cpu/gpuModules™
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BDM-610000090 Rev A CNV36JXNX User’s Manual iv
Table of Contents
Chapter 1 Introduction........................................................................6
CNV36JXNX cpu/gpuModule.............................................................................................7
CNV36JXNX Model Options................................................................................................9
Cable Kits and Accessories ...................................................................................................9
Board Features....................................................................................................................10
Block Diagram.....................................................................................................................12
Specifications........................................................................................................................13
Physical Characteristics.......................................................................................................13
Power Consumption.............................................................................................................14
Operating Conditions...........................................................................................................14
Electrical Characteristics.......................................................................................................15
Migrating to RTD’s NVIDIA® Jetson Series cpu/gpuModule....................................17
Connector Pinout & Function Differences.........................................................................17
Software Differences.............................................................................................................18
Contact Information ..........................................................................................................19
Chapter 2 Getting Started...................................................................20
Proper Grounding Techniques .........................................................................................20
Selecting the Stack Order for the CNV36JXNX...........................................................20
Connecting to the Stack.....................................................................................................21
Power Input Connections..................................................................................................21
Booting the CNV36JXNX cpu/gpuModule for the First Time....................................21
Chapter 3 Connecting the cpu/gpuModule..................................22
Connector Locations............................................................................................................23
Auxiliary Power (CN3)......................................................................................................26
Utility Port 2.0 Connector (CN5).....................................................................................28
USB 2.0 Connection ............................................................................................................29
System Reset ........................................................................................................................29
Soft Power Button................................................................................................................29
Battery...................................................................................................................................29
DisplayPort Connector (CN4)..........................................................................................30
Serial Port 1 (CN7) and Serial Port 2 (CN8).................................................................32
Serial Port UART.................................................................................................................32
RS-232 Serial Port (Default)...............................................................................................32
RS-422 or RS-485 Serial Port.............................................................................................33
CAN Bus ...............................................................................................................................35
Digital I/O Port (CN6).......................................................................................................36
Ethernet (10/100/1000Base-T and -TX) Connector (CN20)........................................37
MIPI CSI-2 Camera Connectors (CN13, CN23)...............................................................38
PCIe/104 Type 2 Bus (CN1 - Bottom)..............................................................................39
PCIe/104 Type 2 Compatibility...........................................................................................42
PCIe Link Configuration.....................................................................................................42

BDM-610000090 Rev A CNV36JXNX User’s Manual v
Reserved (CN16 and CN12)...............................................................................................42
Chapter 4 Using the cpu/gpuModule..............................................43
Operating System Specific Usage ....................................................................................44
Flashing the OS onto the NVIDIA eMMC............................................................................44
Linux for Tegra®...................................................................................................................44
Digital I/O ............................................................................................................................44
Power Management............................................................................................................45
Power Management...............................................................................................................45
Power Button Modes............................................................................................................45
Low-Power Wake Options...................................................................................................45
AT vs. ATX Power Supplies................................................................................................45
ATX Power Supply Signals.................................................................................................45
Thermal Management.........................................................................................................46
Appendix A Hardware Reference .......................................................47
Jumper Settings and Locations........................................................................................48
Onboard PCI/PCIe Devices..............................................................................................49
Physical Dimensions...........................................................................................................50
Heatsink Dimensions..........................................................................................................51
Flat-Heat Spreader Dimensions..........................................................................................51
Appendix B Troubleshooting ..............................................................53
Common Problems and Solutions....................................................................................54
Troubleshooting a PC/104 System...................................................................................55
How to Obtain Technical Support...................................................................................55
Appendix C IDAN™ Dimensions and Pinout...............................56
IDAN Contents....................................................................................................................57
IDAN Dimensions...............................................................................................................57
IDAN Connectors ...............................................................................................................58
External I/O Connections .................................................................................................60
Appendix D Additional Information................................................63
NVIDIA Driver Information: .............................................................................................63
PC/104 Specifications.........................................................................................................63
Appendix E Limited Warranty ........................................................64

BDM-610000090 Rev A CNV36JXNX User’s Manual 6
Chapter 1 Introduction
This manual provides comprehensive hardware and software information for users developing with the
CNV36JXNX PCIe/104 cpu/gpuModule.
Note Read the specifications beginning on page 13 prior to designing with the
cpu/gpuModule.
This manual is organized as follows:
Chapter 1 Introduction
introduces main features and specifications
Chapter 2 Getting Started
provides abbreviated instructions to get started quickly
Chapter 3 Connecting the cpu/gpuModule
provides information on connecting the cpu/gpuModule to peripherals
Chapter 4 Using the cpu/gpuModule
provides information to develop applications for the cpu/gpuModule, including general
cpu/gpuModule information, detailed information on storing both applications and system
functions, and using utility programs
Appendix A Hardware Reference
lists jumper locations and settings, physical dimensions, and processor thermal
management
Appendix B Troubleshooting
offers advice on debugging problems with your system
Appendix C IDAN™ Dimensions and Pinout
provides connector pinouts for the cpu/gpuModule installed in an RTD Intelligent Data
Acquisition Node (IDAN) frame
Appendix D Additional Information
lists sources and websites to support the cpu/gpuModule installation and configuration
Appendix E Limited Warranty

BDM-610000090 Rev A CNV36JXNX User’s Manual 7
CNV36JXNX cpu/gpuModule
RTD's CNV36JXNX cpu/gpuModule represents the latest in high performance PCIe/104 embedded
controllers witha Type 2 bus. Thisdesignisbased on the NVIDIA®Jetson Xavier NX system-on-module.
The type 2 PCIe bus connector supports Gen 3.0 PCIe for four PCIe x1 lanes and two PCIe x4 lanes. A
M.2 E-key socket is available on the bottom side of the board for wireless modules and a M.2 B-key socket
is available on the top side for WWAN modules or SSDs. Both slots utilize PCI-Express and USB
connectivity.
Jetson Xavier NX Onboard memory consists of 8 GB of embedded 128-bit LPDDR4 DRAM with a speed
of 57.9GB/s.
The cpu/gpuModule’s DisplayPort video interface supports audio and a maximum resolution of 4096 x
2304.
The Jetson Xavier NX has a 16GB eMMC 5.1 Flash storage device, a microSD socket is also available on
the CNV36JXNX carrier for expansion. M.2 NVMe/PCIe based SSDs can also be used with theboard either
by means of the M.2 B-key socket or by using additional carrier board (SSD34200/SSD34100). The onboard
M.2 B-key socket only has USB3.1 and PCIe X1 interfaces. M.2 B+M-key SATA based SSDs will NOT
work in this socket as the NVIDIA Xavier NX does not support SATA peripherals. Because the M.2
NVMe/PCIe socket only has a PCIe x1 interface connected rather than the typical PCIe x2 interface some
NVMe/PCIe based SSDs may experience slower read and write speeds than advertised.
A xHCI controller supplies five USB 3.1 connections, with up to 10Gb/s data throughput each. Two
connections are routed to the bottom PCIe connector and two connections are available at USB A
connectors. One additional USB 2.0 port is utilized in the Utility port for the use of a keyboard and mouse.
Network connectivity is provided by a 10/100/1000 Mbps on-board Ethernet controller.
Other features include two RS-232/422/485 configurable serial ports, one of which (CN7) has a CAN bus
mode. The board also features two MIPI CSI-2 ports which can be used for connecting cameras. These
ports are 15-pin FFC
The CNV36JXNX is also made available in a rugged passively cooled IDAN enclosure.
Figure 1 CNV36JXNX cpu/gpuModule (top view)

BDM-610000090 Rev A CNV36JXNX User’s Manual 8
You can easily customize the cpu/gpuModule by stacking PCI/104-Express or PCIe/104 modules such as
video controllers,Digital Signal Processors, drivecarriers, LAN controllers, or analog and digital data
acquisition modules. Stacking modules onto the cpu/gpuModule avoids expensive installations of
backplanes and card cages and preserves the module's compactness.
The cpu/gpuModule is verified with Linux for Tegra operating system. Ordering Information
The CNV36JXNX cpu/gpuModule is available with one type of system-on-module and heatsink. The
cpu/gpuModule can also be purchased as part of an Intelligent Data Acquisition Node (IDAN™) building
block, which consistsof the cpu/gpuModule and a milled aluminum IDAN frame. The IDAN building
block can be used in just aboutany combination with other IDAN building blocks to create a simple but
rugged PC/104 stack.
Refer to Appendix C IDAN™ Dimensions and Pinout, for more information. The CNV36JXNX
cpu/gpuModule can also be purchased as part of a custom-built RTD HiDAN™ or HiDANplus High
Reliability Intelligent Data Acquisition Node. Contact RTD for more information on its high reliability
PC/104 systems.
Figure 2 CNV36JXNX cpu/gpuModule (With NX and standard
heatsink)

BDM-610000090 Rev A CNV36JXNX User’s Manual 9
CNV36JXNX Model Options
The basic cpu/gpuModule model options are shown below. Refer to the RTD website (www.rtd.com) for
moredetailed ordering information and any new variations that may be available.
Table 1 CNV36JXNX cpu/gpuModule Model Options
Part Number
Description
CNV36JXNX68201HR
NVIDIA® Jetson Xavier NX CPU module with standard heat sink
CNV36JXNX68201HRF
NVIDIA® Jetson Xavier NX CPU module with flat heat spreader
IDAN-CNV36JXNX68201HR
NVIDIA® Jetson Xavier NX CPU module in an IDAN frame
Cable Kits and Accessories
For maximum flexibility, RTD does not provide cables with the cpu/gpuModule. You may wish to
purchase theCNV36JXNX cpu/gpuModule cable kit (XK-CM124), which contains:
•Utility Port 2.0 multi-function cable
-(2x USB 2.0 ports, battery, reset button, power button,speaker)
•DIO cable (DIL-16 to DSUB-25)
•Two serial port cables (DIL-10 to DSUB-9)
•One Ethernet cable (DIL-10 to RJ-45)
For additional accessories, refer to the RTD website.

BDM-610000090 Rev A CNV36JXNX User’s Manual 10
Board Features
•NVIDIA® Jetson Xavier NX system-on-module
Part Number
Cores
Core
Frequency
L1 Cache
L2 Cache
L3 Cache
Stack Height
CNV36JXNX68201HR
3x 2
1.4 GHz -
1.9 GHz
128 KB Instruction
64 KB Data
2 MB per 2-core
cluster
4MB
shared
Any (stack down
only)
•Volta GPU
–384 NVIDIA® CUDA® cores
–48 Tensor cores
–End-to-end lossless compression, Tile Caching, OpenGL® 4.6, OpenGL ES 3.2, Vulkan™
1.10, CUDA 10
–Maximum Operating Frequency: 1100MHz
•Carmel CPU
–ARMv8.2 (64-bit) heterogeneous multi-processing (HMP) CPU architecture
–3x dual-core CPU clusters (six NVIDIA® Carmel processor cores) connected by a high-
performance system coherency interconnect fabric
–L3 Cache: 4 MB (shared across all clusters)
–NVIDIA® Carmel (Dual-Core) Processor: L1 Cache: 128 KB L1 instruction cache (I-cache)
per core; 64 KB L1 data cache (Dcache) per core, L2 Unified Cache: 2 MB per cluster
–Maximum Operating Frequency: 1900 MHz
•Memory
–8 GB 128-bit LPDDR4x DRAM
–Secure External Memory Access
–Using TrustZone® Technology
–System MMU
–Maximum Operating Frequency: 1600 MHz
•Storage
–16 GB eMMC 5.1 Flash Storage
–Bus Width: 8-bit, Maximum Bus Frequency: 200 MHz (HS400)
–micro-SD card slot
–M.2 B-key slot
•Stackable 156-pin PCIe/104 Type 2 bus on bottom
–Two PCI Express x4 Links. Gen 3, 8 GT/s
–Four PCI Express x1 Links. Gen 3, 8 GT/s
–Two USB 2.0
–ATX Power Supply Signaling
–RTC Battery
•Advanced Thermal Management
–Thermal Monitor throttles processor and memory to prevent thermal runaway
–Modified heatsinks and flat heat spreaders are available
–Mini Fan Heatsink with Auto Fan control
–Passive Structural Heatsink & Heatpipes in IDAN and HiDAN System Configurations
•Real-Time Clock (external battery required to maintain time only)
•Complete Single Board Computer