Auvidea X221-LC Product manual

AUVIDEA
X221, -LC, -AI
TECHNICAL
REFERENCE
MANUAL
SCOPE OF WORK
Providing technical information and documentation for the X221, -LC, -AI carrier boards for
the AGX Xavier
REPORT NUMBER
38413
ISSUE DATE [REVISED DATE]
16.NOV.2021 [Feb.2023]
Version
1.8
PAGES
43

X221, -LC, -AI
TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
Contents
SECTION 1 Document revisions and changes ................................................................ 5
SECTION 2 Product revisions, changes and problems .................................................... 6
2.1 Bootproblem................................................................................................................................................ 6
SECTION 3 Overview .................................................................................................... 8
3.1 Model comparison....................................................................................................................................... 8
3.2 Technical specification................................................................................................................................. 9
3.3 Model pictures........................................................................................................................................... 10
3.4 Power consumption................................................................................................................................... 11
SECTION 4 Features.....................................................................................................12
4.1 Crypto authentication chip ........................................................................................................................ 12
4.2 Safety MCU ................................................................................................................................................ 12
4.2.1 Features............................................................................................................................................. 12
4.2.2 Block diagram of Safety MCU............................................................................................................ 12
4.2.3 Schematic of Safety MCU section ...................................................................................................... 13
4.2.4 Pinout basic MCU .............................................................................................................................. 14
SECTION 5 Pinout description......................................................................................15
5.1 J2 - POWER PORT....................................................................................................................................... 15
5.2 J4 - Ethernet............................................................................................................................................... 15
5.3 J5 - MCU UART........................................................................................................................................... 15
5.4 J6 - CAN1.................................................................................................................................................... 15
5.5 J7 - I2C........................................................................................................................................................ 15
5.6 J8 - FAN ...................................................................................................................................................... 16
5.7 J10 - Debug ................................................................................................................................................ 16
5.8 J11 - HDMI.................................................................................................................................................. 16
5.9 J12 - CAN0.................................................................................................................................................. 16
5.10 J14 - MCU................................................................................................................................................... 17
5.11 J15 - 2x USB 3.1.......................................................................................................................................... 17
5.12 J17 - MICRO USB ........................................................................................................................................ 18
5.13 J18 –Wi-Fi.................................................................................................................................................. 18
5.14 J19 - SUPER CAP UPS.................................................................................................................................. 18
5.15 J20 - PCIEx4/x1/USB/UART/I2C/GPIO........................................................................................................ 18
5.16 J21 - POWER BUTTON................................................................................................................................ 20
5.17 J22 - ETHERNET.......................................................................................................................................... 20
5.18 J23 - I2S/I2C ............................................................................................................................................... 20
5.19 J25 - FORCE RECOVERY BUTTON................................................................................................................ 20
5.20 J26 - RESET BUTTON .................................................................................................................................. 20
5.21 J27 - MICRO SD-CARD/UFS SLOT ............................................................................................................... 21
5.22 J28 - CSI-2................................................................................................................................................... 21
5.23 J29 - USB 2.0 .............................................................................................................................................. 23
5.24 J31 - POWER OUT....................................................................................................................................... 23
5.25 J32 –USB(3) ............................................................................................................................................... 23

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TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
5.26 J33 –USB(2) ............................................................................................................................................... 24
5.27 J34 –USB(1) ............................................................................................................................................... 24
5.28 J35 - POWER OUT....................................................................................................................................... 24
5.29 J36 - I2S2.................................................................................................................................................... 24
5.1 RGB LED ..................................................................................................................................................... 24
SECTION 6 FAQ ...........................................................................................................25
SECTION 7 Disclaimer..................................................................................................26
SECTION 8 Copyright notice.........................................................................................27
SECTION 9 Appendix A [CSI-Cameras]..........................................................................28
9.1 Camera connection example ..................................................................................................................... 28
9.2 Test CSI-Camera functionality.................................................................................................................... 29
SECTION 10 Appendix B [GPIO] .....................................................................................30
10.1 GPIO control .............................................................................................................................................. 30
10.1.1 Export GPIO ....................................................................................................................................... 30
10.1.2 Change direction to in ....................................................................................................................... 30
10.1.3 Change direction to out..................................................................................................................... 30
10.1.4 Set GPIO low ...................................................................................................................................... 30
10.1.5 Set GPIO high..................................................................................................................................... 30
10.1.6 Readout GPIO value........................................................................................................................... 30
10.2 Pin to GPIO reference sheet for Xavier-NX/Nano/TX2-NX ........................................................................ 31
10.3 How to calculate GPIOs.............................................................................................................................. 33
10.3.1 GPIOnumber ...................................................................................................................................... 33
10.3.2 GPIOletter.......................................................................................................................................... 33
10.3.3 GPIOdigit ........................................................................................................................................... 33
10.3.4 GPIOoffset ......................................................................................................................................... 33
10.3.5 Example ............................................................................................................................................. 33
10.3.6 Table.................................................................................................................................................. 34
SECTION 11 Appendix C [I2C] ........................................................................................35
11.1 I2C device bus ............................................................................................................................................ 35
11.2 I2C usage of devices and registers............................................................................................................. 35
11.2.1 List i2c devices on a specific bus ........................................................................................................ 35
11.2.2 Dump i2c device registers.................................................................................................................. 36
11.2.3 Set register value:.............................................................................................................................. 36
11.2.4 Read register value:........................................................................................................................... 36
11.2.5 Test IMX219 camera stream ............................................................................................................. 36
SECTION 12 Appendix D [SSD-Boot]...............................................................................37
SECTION 13 Appendix E [Wi-Fi] .....................................................................................38
13.1 Options from AUVIDEA .............................................................................................................................. 38

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TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
13.1.1 U100 Adapter .................................................................................................................................... 38
13.1.2 LM823 with cable .............................................................................................................................. 38
13.1.3 38458 Wi-Fi card ............................................................................................................................... 39
13.1.4 38459 Wi-Fi card ............................................................................................................................... 39
13.1.5 U101 Adapter .................................................................................................................................... 39
13.1.6 U102 Adapter .................................................................................................................................... 39
13.2 Options from other sources....................................................................................................................... 40
13.2.1 ST60-2230C-UU by Laird.................................................................................................................... 40
13.2.2 Further modules ................................................................................................................................ 40
13.3 DIY integration ........................................................................................................................................... 40
13.3.1 Enable USB interface ......................................................................................................................... 40
13.3.2 Set voltage......................................................................................................................................... 41
13.3.3 Soldering on Module ......................................................................................................................... 41
13.3.4 Result................................................................................................................................................. 41
13.4 Test Wi-Fi module connection................................................................................................................... 42
13.4.1 With GUI............................................................................................................................................ 42
13.4.2 Without GUI....................................................................................................................................... 42
SECTION 14 END OF DOKUMENT...................................................................................43

X221, -LC, -AI
TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
SECTION 1 Document revisions and changes
Document
version
Changes
1.0
Initial document, internal verification process
1.1
Internal verification process
1.2
Restructuring of document, added Appendix B, C
1.3
Adding Socket Pins
1.4
Adding Appendix D & E and fixed missing table in Appendix B
1.5
Minor changes
1.6
Updated Appendix D, added pinout description header
1.7
Corrected the Extension port for CSI-2 from up to 8 cameras to up to 4 cameras

X221, -LC, -AI
TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
SECTION 2 Product revisions, changes and problems
Product
version
Changes
38413-2
Crypto chip
38413-4
Safety MCU, Change of Ethernet controllers, MCU UART to LTE, CAN RX/TX
2.1 Bootproblem
Some of the X221 has got a boot problem:
Which carrier boards are affected:
•X221 –38413 rev 5 and below
•X221-AI –38413 rev 5 and below (MCU firmware fix available)
What is the boot problem:
The Jetson's boot process could randomly get interrupted due to falsely receiving a signal through
the UART interface.
How is it caused:
The UART's receive pin (pin 3 = UART3_RX) is floating due to a missing pull down resistor, this can
cause the signal to oscillate right around the threshold of the level shifter which then turns this false
signal into a proper 3.3V signal that send a false "keystroke" to the Jetson. If the Jetson is in the
bootloader part of the boot process and at that particular time happens to wait for an input during:
"Hit any key to stop autoboot" then the Jetson enters the U-Boot/CBoot/UEFI and stops the boot
process. This interrupt message accepts any signal and has a three second time window.
Observations of our limited testing (your mileage may vary):
•Nothing plugged into the UART connector
Most of the time the issue did not appear, however other surrounding signals could interfere and
have an impact on this behavior, same with the aging of the carrier board and degradation of the
components.

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TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
•UART is connected to another device
The problem should not appear since the signal is not floating anymore and the message interrupting
the boot process would have to come from the other device instead.
•UART has wires plugged in which are not connected to anything
In this case, problems may arise. If the distance is too small to the carrier board, a person can trigger
signals at the Jetson through electromagnetic waves.
This can be thought of as a kind of antenna, which then receives signals.
For example simply approaching a 15cm/~6in long "antenna" with your hand at a distance of
~20cm/~8in or less causes the Jetson so stop booting 100% of the time.
How to fix this issue:
The ideal solution is to add the missing resistor in the schematics but this requires a new hardware
revision. On some of the above mentioned versions of the affected carrier boards this issue can be
resolved by using a special MCU firmware which adds an internal pull down resistance to keep the
signal from floating. For the other boards the temporary fix is to connect UART RX to ground, so the
signal gets pulled down. The connector that shorts these two pins (pin 3 and pin 6) will be included.

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TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
SECTION 3 Overview
3.1 Model comparison
Description
X221-LC (Rev 2)
X221-AI (Rev 2)
X221 (Rev 4)
X221-AI (Rev 4)
2x GbE (RJ45)
1x native, 1x i210
PCIe to GbE
1x native, 1x i210
PCIe to GbE
2x RTL8111 PCIe
to GbE
2x RTL8111 PCIe to
GbE
HDMI out
1x
1x
1x
1x
USB 2.0
1x micro
4x
1x micro
4x
USB 3.0
2x
2x
2x
2x
LM823 Wifi
-
2x (optional)
-
2x (optional)
Safety MCU (for JAXi)
-
-
-
yes
Basic MCU
yes
yes
yes
-
Remote power control &
debug via LTE
-
-
-
yes
MicroSD/UFS card slot
-
1x
-
1x
UART
1x
2x
1x
3x
I2S
-
2x
-
2x
I2C
1x
2x
1x
2x
Extension port for PCIe
x4/x1/USB/UART/I2C/GPIO
-
yes
-
yes
Extension port for CSI-2
-
3x4X or 4x4X (with
addon board
M222 (38548) or
M220 (38451))
-
3x4X or 4x4X
(with addon board
M222 (38548) or
M220 (38451))
Operating Voltage
12V
12-48V
12V
12-48V
Jetson power modes
30W + MAXN
30W
30W + MAXN
30W
Super Cap UPS
-
(optional)
-
(optional)
Power out (5V, 12V)
-
yes
-
yes
Power/Reset/Force-Recovery
Buttons
-
yes
-
yes
RTC super cap
200mF
200mF
200mF
200mF
Auto flashing
yes
yes
yes
yes
CAN (RX/TX only)
1x
1x
1x
1x
CAN
-
1x
-
1x
Debug port
-
-
yes
yes
Fan connector (5V, PWM)
1x
1x
1x
1x
RGB LED (GPIO controlled)
-
1x
-
1x
Revers voltage protection
(low voltage drop MOSFET)
yes
yes
yes
yes
Overvoltage protection
yes
yes
yes
yes
Rechargeable lithium cell
(MS621FE)
(optional)
(optional)
(optional)
(optional)
Crypto authentication chip
-
-
yes
Yes

X221, -LC, -AI
TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
3.2 Technical specification
Description
Note
HDMI
2.0, 4k60p
USB 3.1
10Gb/s
Physical size
125mm x 104.6mm
3D STP model available
Mounting holes
4x M3
Temperature range
-25°C to +80°C
Cold temperature monitoring
with MCU optional
Humidity
Noncondensing humidity
Longevity
No temperature sensitive electrolytic
capacitors

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TECHNICAL REFERENCE MANUAL
VERSION: 1.7
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Feb.202
3.3 Model pictures
Top side
Bottom side
X221
(Rev 4)
X221-AI
(Rev 4)
The picture shows a prototype custom heatsink, designed for the AGX Xavier. It is
designed to mount a standard 80x80mm fan.