Auvidea J120 Technical Reference Manual

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Page 1

VERSION 1.9

J120 (38198-X)

J120

technical reference manual

38198-X

Version 1.9

Preliminary

March 2018

Auvidea GmbH

Kellerberg 3

D-86920 Denklingen

Te l: +49 824 3 77 1 4 6 2 2

[email protected] www.auvidea.com!

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TECHNICAL REFERENCE MANUAL

Page 2

VERSION 1.9

J120 (38198-X)

Trad em ar ks

NVIDIA, the NVIDIA logo, CUDA, Jetson, Maxwell,Tegra and VisionWorks are registered trademarks and/or trademarks of NVIDIA Corporation in the United States and!other countries. Other company and product names may be trademarks of the respective companies with which they are associated.

No part of this document or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of the author, unless otherwise indicated for stand-alone materials.

You may share this document by any of the following means: this PDF file may be distributed freely, as long as no changes or modifications to the document are made.

For any other mode of sharing, please contact the author at the email below. [email protected]

Commercial use and distribution of the contents of this document is not allowed without express and prior written consent of Auvidea GmbH.

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VERSION 1.9

J120 (38198-X)

Features

J120 carrier board for the NVIDIA® Jetson™ TX1

The J120 carrier board is slightly larger than the TX1 compute module. It has the same height but it extends out to to the left side, to make room for the USB3 and RJ45 connectors. It is plugged in below the TX1 and brings out many interfaces on connectors.

Techn ical de tai ls

• carrier board for one NVIDIA® Jetson™ TX1 compute module

• standalone operation

• one 4 lane CSI-2 (22 pin FPC 0.5mm pitch) - B102

• micro SD card

• two USB3 type A

• RJ45 connector for 10/100/1000BT Ethernet

• UART 0 (3.3V TTL) (6 pin) - console access

• one I2S digital audio (6 pins each)

• fan connector (4 pin)

• mini HDMI out

• M.2 type M 2280 (not operational on J120 rev 1)

• size: 50 x 119 mm (size of the PCB)

• height: 16 mm (incl. TX1 without heatsink without height of bottom side components of J100)

• height: 21 mm (incl. TX1 without heatsink including height of bottom side components of J100)

• weight: 42 grams (just the J120)

• TX1 weight: 144 grams (TX1 with heatsink), 75 grams (TX1 w/o heatsink)

• mounting: 4 M3 holes with 3.2mm each (42 x 79 mm spacing - 4 mm from each edge)

• model: 38198 (J120 rev 1)

Power

• power: 12V typical (4 pin) - 2 power pins for redundant powering

• range: 7V to 17V

• do not use the 19V power supply of the Jetson TX1 dev kit - it will damage the J120 carrier board

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VERSION 1.9

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How do the various models differ?

J100 + M100 (or M110)

The J100 may be plugged into the M100 motherboard. Three motherboard connectors carry signals for CAN, Ethernet, UART, power, PCIe, SATA, SPI, I2C and more. The M110 features standard connectors for SATA and PCIe (4 lanes).!

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Feature

J100

J100 + M100

J120

J130

J140

Jetson TX1 compatible

✓✓✓✓✓

HDMI out

mini

standard

mini

USB 3.0 type A

--242

micro USB 3.0

22-1-

micro USB 2.0 OTG

✓✓✓

✓

Wifi (2 antennas) on TX1 module

✓✓✓v✓

10/100/1000 Ethernet (RJ45)

-1112

(TX1 + i210)

IMU MPU-9250 (optional 9 axis sensor)

✓✓✓✓✓

CAN controllers

-1111

SATA-M.2 B 2242

standard

4x PCIe--

M.2 M 2280

PCIe slot

M.2 2280

micro SD card

✓✓✓✓✓

SPI/I2C--

1/1

UART1222

CSI-2 (22 pin - 4 lanes)

221

2 HDMI in

CSI-2 (15 pin - 2 lanes)

22---

I2S (digital audio)

1 (2 channels)

2 HDMI in

1 (8 channels)

fan connector

✓✓✓✓✓

switches: power, reset, force recovery

✓✓✓

✓

size

50x87mm

98x87mm

50x110mm

74x110mm

68x110mm

power in

7 .. 17V

7..42V

7 .. 17V

battery charger & backup

----2S Lipo

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VERSION 1.9

J120 (38198-X)

J120 Rev 1 (38198)

First revision of the J120. Very limited distribution.

J120 Rev 2 (38198-2)

Second revision of the J120. It became available in late April 2016. Modifications:

• all 3 connectors on the left are aligned (Ethernet, USB3 and mini HDMI)

• PCB size: 50 x 109.5 mm, total size: 50 x 110 mm

• M.2 type M fixed

• auto start recovery time shortened

• optional super cap for RTC

• firmware upgrade (back powering fix)

• INT lines of CAN controllers connect to individual pins of the TX1 (interrupts not shared)

J120 Rev 3 (38198-3)

• fixed USB2 power (flash recovery now supported)

• optional resistor to combine power to the 2 USB 3 ports

• added UART2 RXD/TXD to J7 (with components changes it could be reverted back to UART0 RTS/CTS)

• replaced 12V power in diodes with MOSFETs (for controlled inrush ramp up with Lipo batteries)

• four TX1 mount holes now connected to GND

• added LM75 temp sensor

• only one CAN bus and connector (CAN2) to overcome problem with SPI1_CS0 line - one CAN bus

supported with TX1 firmware provided by Auvidea

J120 Rev 4 (38198-4)

• changed I2C pullup resistors from 1k to 10k (to improve I2C signal low level)

J120 Rev 5 (38198-5)

• I2S connector: changed from I2S2 to I2S0 (for additional GPIOs)

• optional: 2 CAN busses (requires SW fix for SPI1_CS0)

• M.3 spacer to fix M.2 2280 SSD card

• bottom USB3 connector may be configured to carry SATA signals (optional)

J120 Rev 6 (38198-6)

• added MCU (STM32F042) for watchdog option - this MCU tunnels the UART0 port of the TX1 and TX2

• initial revs of the MCU firmware only support 38400 baud

• added INA3221 power monitor chip (12V, 5V, 3.3V) - this chip is not populated on the base version

J120 Rev 7 (38198-7)

• RN45 populated to bring out UART2 on connector J7

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VERSION 1.9

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J120 rev 5 top side

J120 rev 5 bottom side

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The optional super cap is the tallest component on the bottom side (5.5mm high). The capacity of the super cap is 47mF. Optionally the RTC (realtime clock of the Jetson TX1) may be powered by a Lithium cell (MS621FE-FL11E). It is located next to the power button. If the super cap and the Lithium cell are not populated, RTC power may be provided on the buttons connector (J12 pin 1).

Testing of the J120

The following functions are tested:

• HDMI out

• 1000BT Ethernet

• USB 3.0 on USB1

• USB 2.0 on USB2 (USB 3 mode requires modification of device tree file)

• micro SD card

• power consumption with 12 V power supply (Ubuntu booted and system idle)

Rev 3 and newer:

• CSI-2 interface with B102 HDMI to CSI-2 module

• CAN bus (communicating with Autoquad flight controller)

• IMU (with qtcreator test program)

• M.2 2280 PCIe SSD

Please have a look at the test report which is included with the shipment.

STEP (3D) models

J120 rev 1: http://www.auvidea.eu/download/step/38198.step.zip

J120 rev 2: http://www.auvidea.eu/download/step/38198-2.step.zip

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VERSION 1.9

J120 (38198-X)

Getting started

Applying power

The J120 is powered by the on-board power connector (J11). Rev 1 and 2: each of the 2 separate power pins features a Schottky diode. These 2 diodes OR the 2 power inputs together. So 2 independent power inputs are provided to achieve redundant powering. Rev 3+: reverse voltage protection and inrush current limiting have been added (now single power input on 2 pins). Alternatively the power wires may be soldered directly to the J120. Two power holes have been added between the power connector and the mount hole.

Auto start

The J120 automatically powers up the TX1 with a digital one shot which pulls the POWER-BTN input of the TX1 low for approximately 1 second after power is applied. When the TX1 raises the CARRIER_PWR (A48) line, the power supplies on the J120 are powered up. This is indicated by lighting up the green power LED below the fan connector. With rev 3 this LED moved to the right of the M.2 connector.

The auto start logic is powered by Vdd_RTC (A50). Rev 1: for auto start to work, please power down the TX1 for at least 10 seconds. This allows time for the Vdd_RTC supply to drain and the enable auto start, when power is applied again. Rev 2 of the J120 will shorten this time, by actively draining Vdd_RTC when the main power is removed. Alternatively power up the J120 by pressing the power button. With rev 3 the auto start logic is powered by the 12V power supply, not to drain Vdd_RTC and the super cap charge.

Console access

The console port of the TX1 is UART 0. The J120 converts this UART port to standard 3.3V TTL levels. So a standard USB to TTL serial converter may be used to connect to the console. Just connect TXD, RXD and GND to the USB converter. Make sure that you connect TXD to the RXD input of the USB TTL converter. Standard baud rate it 115200. Settings: 8/1/N.

Firmware upgrade of the TX1

The J120 does support a direct firmware upgrade of the TX1. However, there is one issue on rev 1. Once the USB cable to USB0 is connected the J120 will be back powered through USB. In this mode the J120 will not boot. Please put the the TX1 into the upgrade mode with the recovery button before connecting the USB cable to USB0. Alternatively please perform the firmware upgrade on the TX1 development board. Firmware upgrade is supported fine on the newer revs.

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CSI-2 video in

CSI-2 connector

The J120 features one CSI-2 connector with 4 data lanes. It is a 22 pin FPC connector with 0.5mm pitch. It has the same pin out as the 22 pin CSI-2 connector found on the carrier board for the Raspberry Pi compute module. Support for the Raspberry Pi cameras is planned.

B102

The B102 is an HDMI to CSI-2 converter module, which may directly be connected to the CSI-2 connector of the J120. It provides raw uncompressed video to the Jetson TX1 with a resolution up to 1080p60. This video then may be compressed or processed in the TX1. A typical application for this task is the GStreamer. A driver developed by Ridgerun is provided and included in the Auvidea TX1 firmware. Please contact us for the source code of the driver.

To shiba 4 1 M P i xe l Ca m e ra

Raytrix provides the C41 camera module. Auvidea has developed a small interface board to connect the C41 camera module to the J120. A resolution up the 4kp60 is supported (2160p60). The Bayer encoded video is provided raw to the TX1 and converted in the graphics engine of the TX1. For more CSI-2 ports please have a look at the new J140 carrier board with three 4-lane CSI-2 ports.

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Devices

IMU (MPU-9250)

A 9 axis sensor is connected to the SPI0 bus of the TX1. Pin 8 (VddIO) of the IMU is connected to 1.8V. Please set the INT output of the IMU by software to „totem pole“ mode as there is no pull-up on the INT output.

This IMU is optional. Only some J120 models are equipped with this function.

SPI busses with the Jetson TX1

The Jetson TX1 features 3 SPI busses: SPI0 to SPI2. The table below lists how these SPI devices are mounted. Please note how the 5 physical SPI devices relate to the 5 spidevs.

Test of t he IMU wit h t he RTIMULibDemo

This demo may be downloaded from Github. Please install qtcreator first. Next please make sure that the spidev3.0 device in /dev is loaded. Edit the RTIMUlibDemo.ini file with the SPI settings for the IMU (bus 3, select 0). Start the demo as root so it gets access to the SPI bus.

The IMU chip is located on the bottom side next to the JTAG connector. The IMU is optional on the J120. Please make sure that your J120 has the IMU installed.

Function

Jetson TX1

Description

AD0/SDO

SPI0_MISO (1.8V)

SDA/SDI

SPI0_MOSI (1.8V)

SCL/SCLK

SPI0_CLK (1.8V)

/CS

SPI0_CS0 (1.8V)

INT

G14

INT is inverted and connected to GPIO9_MOTION_INT (1.8V)

BusCSTegra X1

SPI device

Use

SPI00SPI4

spidev3.0

IMU MPU-9250

SPI10SPI1

spidev0.0

CAN controller 1 (MCP2515)

SPI11SPI1

spidev0.1

CAN Controller 2 (MCP2515)

SPI20SPI2

spidev1.0

I2C/SPI connector J13

SPI21SPI2

spidev1.1

I2C/SPI connector J14

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I2C busses with the Jetson TX1

The Jetson TX1 features 7 I2C devices: I2C0 to I2C6. The table below lists how these I2C devices are mounted.

A B102 module may be connected to the CSI-2 EF connector. The Toshiba TC358743 HDMI to CSI-2 converter chip is on the 7 bit I2C address 0x0F, as it can be seen in the terminal output below.

$ sudo i2cdetect -y -r 2 !!!!0 !1 !2 !3 !4 !5 !6 !7 !8 !9 !a !b !c !d !e !f 00: !!!!!!!!!-- -- -- -- -- -- -- -- -- -- -- -- 0f 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -50: 50 51 52 53 -- -- -- -- -- -- -- -- -- -- -- -60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- -- !!!!!!!!!

CAN

The J120 features 1 or 2 CAN interfaces. As the Jetson TX1 does not have native CAN interfaces, the J120 features 2 SPI based CAN controllers (Microchip MCP2515). Please install the Kernel and support package with the MCP2515 driver, which is provided by Auvidea. Because of a bug in the SPI_CS_0 handling only 1 CAN controller is populated.

$ sudo modprobe mcp251x

$ sudo ip link set can0 up type can bitrate 1000000

$ ifconfig can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 UP RUNNING NOARP MTU:16 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:10 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

eth0 Link encap:Ethernet HWaddr 00:04:4b:57:29:32 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0

Bus

device

physical bus

Use

I2C0

I2C1

LM75ADP temperature sensor

I2C2

I2C_PM

CSI-2 EF connector

I2C3

I2C4

I2C5

I2C6

I2C_CAM

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inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:549 errors:0 dropped:0 overruns:0 frame:0 TX packets:549 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:46707 (46.7 KB) TX bytes:46707 (46.7 KB)

M.2 SSD 2280

The J120 features a very high performance SSD of the NGFF (next generation form factor) kind called now M.2. There are two types available: SATA and 4x PCIe. The J120 only supports the 4x PCIe type (type M). We have tested the Samsung SM951 128GB module (MZ-VPV1280). Please see the picture on the right.

How can the type M card be identified?

M.2 type M card have just one notch on the right side on the bottom. Please see the picture on the right. M.2 type B (SATA) cards have a notch on the right side on top or they have two notches. So M.2 type B (SATA) cards may fit mechanically, but they will not work. Please make sure that the M.2 card for the J120 has just one notch.

Examples of M.2 type M SSDs with PCIe interface:

•

Samsung 950 Pro 256GB (MZ-V5P256BW)

•

Samsung PM961 128GB (MZVLW128HEGR)

•

Samsung SM951 512GB (MZVPV512HDGL)

M.2 NVMe software support on the Jetson TX1

In order to use a M.2 key B SSD on the Jetson TX1, a kernel module supporting NVMe is needed. This module is not part of the dev kit default kernel configuration, so the kernel module needs to compiled. Because of the mixture of 32 bit user space and 64 bit kernel, it is recommended to cross compile the kernel on a Ubuntu

14.04 LTS host machine. For details on cross-compiling a kernel for L4T please visit the!Ridgerun wiki.

https://developer.ridgerun.com/wiki/index.php?title=Compiling_Tegra_X1_source_code#Kernel

The required module '.config' parameter is!

CONFIG_BLK_DEV_NVME=y

or in menuconfig under

Device Drivers -> Block Devices -> NVM Express block device!

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Connectors

Auvidea supplies cable kits for the connectors with 1.25 mm pitch. Please check the website for details. Figure 1 and 2 show the J120 rev 2 but the connector placement and pin numbering also applies to the J120 rev 1.

Figure 1: connectors on the top side

Figure 2: connectors on the bottom side

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USB 3.0 (J2)

This is dual USB 3.0 type a connector. Pin 1-9 is the bottom connector and pin 10-18 is the top connector.

USB 2.0 (J6)

USB 2.0 port for firmware upgrades and for USB 2.0 devices like mouse and keyboard.

Function

Jetson TX1

Description

15V-

5V power controlled by USB2_EN_OC (A19) - max. 900 mA

USB2-D-

B43

USB 2.0 data

USB2-D+

B42

USB 2.0 data

GND

Ground

USB3_RX2-

H42

USB 3.0 receive data

USB3_RX2+

H41

USB 3.0 receive data

GND

Ground

USB3_TX2-

E42

USB 3.0 transmit data

USB3_TX2+

E41

USB 3.0 transmit data

105V-

5V power controlled by USB1_EN_OC (A18) - max. 900 mA

USB1-D-

A39

USB 2.0 data

USB1-D+

A38

USB 2.0 data

GND

Ground

USB3_RX1-

F44

USB 3.0 receive data

USB3_RX1+

F43

USB 3.0 receive data

GND

Ground

USB3_TX1-

C44

USB 3.0 transmit data

USB3_TX1+

C43

USB 3.0 transmit data

Function

Jetson TX1

Description

15V-

5V power controlled by USB0_EN_OC* (A17) - max. 500 mA

USB0-D-

B40

USB 2.0 data

USB0-D+

B39

USB 2.0 data

USB0_ID

A36

connected to 3.3V with 10k pullup

GND

Ground

USB0_VBUS

B37

connected to pin 1 of this connector

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CAN controller (MCP2515T-I/ML)

The two SPI to CAN controllers add two CAN bus interfaces to the TX1, as there is no internal CAN controller in the TX1. The SPI bus, RESET and INT are shared between the 2 CAN controllers (J120 rev 1). The J120 rev 2 will use separate SPI interrupts. Just SPI1_CS0 and SPI1_CS1 select one of the two controllers. The two CAN busses are available on J9 (CAN1) and J10 (CAN2).

Interrupt: the interrupt outputs of the 2 CAN controllers are tied together and have a common 10k pull-up resistor (rev 1).

J120 rev 1: on the silkscreen „CAN1“ and „CAN2“ are swapped. CAN1 is next to the FAN connector.

CAN controller 1:

CAN controller 2:

CAN1 (J9):

CAN2 (J10):

Function

Jetson TX1

Description

15SOF14

SPI1_MISO (level shifted to 3.3V)

14SIF13

SPI1_MOSI (level shifted to 3.3V)

SCK

G13

SPI1_CLK (level shifted to 3.3V)

/CS

E14

SPI1_CS0 (level shifted to 3.3V)

/INT

GPIO20_AUD_INT (low active with 10k pull-up to 3.3V)

/RESET

GPIO5_CAM_FLASH_EN is inverted and connected to the RESET inputs

Function

Jetson TX1

Description

15SOF14

SPI1_MISO (level shifted to 3.3V)

14SIF13

SPI1_MOSI (level shifted to 3.3V)

SCK

G13

SPI1_CLK (level shifted to 3.3V)

/CS

E13

SPI1_CS1 (level shifted to 3.3V)

/INT

GPIO20_AUD_INT (low active with 10k pull-up to 3.3V)

/RESET

GPIO5_CAM_FLASH_EN is inverted and connected to the RESET inputs

Function

Jetson TX1

Description

15V-

5V power for the CAN bus (500 mA)

CAN2_H

CAN data high

CAN2_L

CAN data low

GND

Ground (0V)

Function

Jetson TX1

Description

15V-

5V power for the CAN bus (500 mA)

CAN1_H

CAN data high

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CAN1_L

CAN data low

GND

Ground (0V)

Function

Jetson TX1

Description

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CSI-EF (J14)

This is a 22 pin 4 lane CSI-2 connector with 0.5mm pitch (Wuerth 687122149022). To open the connector and to release the cable just lift the brown lid upwards. This connector has the same pinout as the CSI-2 connector on the Raspberry Pi compute module carrier board. The contacts are on the bottom.

Ethernet (J1)

The J120 features an on-board RJ45 connector for 10/100/1000BT Ethernet with 2 LEDs.

Function

Jetson TX1

Description

3.3V

3.3V power supply

I2C_PM_DAT

3.3V level (converted from 1.8V of the Jetson TX1) - I2C device 2

I2C_PM_CLK

3.3V level (converted from 1.8V of the Jetson TX1) - I2C device 2

GND

Ground

CAM2_MCLK

CAM3_GPIO

GPIO3_CAM1_RST*

GND

Ground

CSI-F_D1+

E21

CSI-2 bus F lane 1

CSI-F_D1-

E20

CSI-2 bus F lane 1

GND

Ground

CSI-F-D0-

C23

CSI-2 bus F lane 0

CSI-F-D0-

C22

CSI-2 bus F lane 0

GND

Ground

CSI-E_CLK+

G22

CSI-2 bus E clock

CSI-E_CLK-

G21

CSI-2 bus E clock

GND

Ground

CSI-E-D1+

H21

CSI-2 bus E lane 1

CSI-E-D1-

H20

CSI-2 bus E lane 1

GND

Ground

CSI-E-D0+

F23

CSI-2 bus E lane 0

CSI-E-D0-

F22

CSI-2 bus E lane 0

GND

Ground

LED

Function

Jetson TX1

Description

GBE0

GBE_LINK_ACT*

E47

left LED

GBE1

GBE_LINK_100

F50

right LED

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HDMI (J3)

This is a 19 pin mini HDMI connector. Please note that the HDMI and mini HDMI connector have different pin outs.

UART 0 (J7)

This is a 6 pin connector with 1.25 mm pitch. Please connect to USB TTL serial converter (3.3V TTL level). Normally just connect TXD, RXD, and GND. Swap data lines. Default speed: 115200 bps. This is the configuration for the J120 rev 1 and J120 rev 2 with a serial number < 2021.

Function

Jetson TX1

Description

GND

Ground

DP1_TXD0+

E39

HDMI data lane 2

DP1_TXD0-

E38

HDMI data lane 2

GND

Ground

DP1_TXD1+

C38

HDMI data lane 1

DP1_TXD1-

C37

HDMI data lane 1

GND

Ground

DP1_TXD2+

D37

HDMI data lane 0

DP1_TXD2-

D36

HDMI data lane 0

GND

Ground

DP1_TXD3+

E36

HDMI clock

DP1_TXD3-

E35

HDMI clock

GND

Ground

CEC

B33

HDMI_CEC

HDMI_DDC_SCL

A35

DP1_AUX_CH

HDMI_DDC_SDA

A34

DP1_AUX_CH*

reserved

not connected

PWR

5V power (max. 500 mA)

HPD

A33

inverted and connected to DP1_HPD

Function

Jetson TX1

GPIO

Description

15V-

5V power output

UART0_TXD

H12

GPIO3_PU.00

UART 0 console port (3.3V TTL level): transmit data output

UART0_RXD

G12

GPIO3_PU.01

UART 0 console port (3.3V TTL level): receive data input

UART0_CTS

H11

GPIO3_PU.03

UART 0 console port (3.3V TTL level): clear to send

UART0_RTS

G11

GPIO3_PU.02

UART 0 console port (3.3V TTL level): ready to send

GND--

Ground

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J120 (38198-X)

UART 0 / UART 2 (J7) - rev 2 to 5

This is the configuration for the J120 rev 2 with a serial number > 2020. All 4 pins are passed through a bidirectional level converter with 3.3V level outputs (TXB0104PWR) and through 33 Ohm series resistors (in a tiny 0804 size resistor array). To limit the power dissipation in the resistor array, it is advised to sink or source a maximum current of 1 mA.

UART 0 (J7) - rev 6

This is the configuration for the J120 rev 6. 2 pins are passed through a bi-directional level converter with

3.3V level outputs (TXB0104PWR) and through 33 Ohm series resistors (in a tiny 0804 size resistor array). To limit the power dissipation in the resistor array, it is advised to sink or source a maximum current of 1 mA. Pin 4 and 5 provide the programming interface for the watchdog MCU (STM42F042).

UART 0 / UART 2 (J7) - rev 7

This is the configuration for the J120 rev 7. All 4 pins are passed through a bi-directional level converter with

If the tunnelling of the UART0 port causes difficulties in a particular use case, the J120 can be reconfigured so that the MCU is bypassed and a direct connection to the UART0 port of the TX1 and TX2 is provided. Please check appendix A for details on the watchdog MCU.

Function

Jetson TX1

GPIO

Description

15V-

5V power output

UART0_TXD

H12

GPIO3_PU.00

UART 0 console port (3.3V TTL level): transmit data output

UART0_RXD

G12

GPIO3_PU.01

UART 0 console port (3.3V TTL level): receive data input

UART2_TXD

B16

UART 2 console port (3.3V TTL level): transmit data output

UART2_RXD

B15

UART 2 console port (3.3V TTL level): receive data output

GND--

Ground

Function

Jetson TX1

GPIO

Description

15V-

5V power output (3.3V if only the MCU is powered)

UART0_TXD--

UART 0 console port (3.3V TTL level): transmit data output

- tunnelled though the watchdog MCU

UART0_RXD--

UART 0 console port (3.3V TTL level): receive data input tunnelled through the watchdog

SWCLK--

port to flash watchdog MCU

SWDIO--

port to flash watchdog MCU

GND--

Ground

AUVIDEA GMBH

TECHNICAL REFERENCE MANUAL

Page 20

VERSION 1.9

J120 (38198-X)

FAN (J8)

This is a 4 pin connector with 1.25 mm pitch. This is the same pinout as the fan connector on the Jetson TX1 development kit. With the J100 the fan is on by default. Use the „fan disable“ feature to turn off the fan.

Please note, that the „fan disable“ requires a software change when compared to the dev kit. On the dev kit „fan disable“ is controlled by an I2C port expander line. On the J100 „fan disable“ is connected to GPIO19_AUD_RST (through an inverting MOSFET). Pull the GPIO19 (F2) high to disable the fan (pin 4 becomes low). A low or floating signal on GPIO19 will not disable the fan.

Power (J11)

This is a 4 pin connector with 1.25 mm pitch. Power in 1 and power in 2 are or’ed with 2 Schottky diodes. They may be tied together or they may be connected to 2 redundant power supplies.

Function

Jetson TX1

GPIO

Description

15V-

5V power output (3.3V if only the MCU is powered)

UART0_TXD--

UART 0 console port (3.3V TTL level): transmit data output

- tunnelled through the watchdog

UART0_RXD--

UART 0 console port (3.3V TTL level): receive data input tunnelled through the watchdog

UART2_TXD

SWCLK

B16

UART 2 console port (3.3V TTL level): transmit data output

- port to flash watchdog MCU

UART2_RXD

SWDIO

B15

UART 2 console port (3.3V TTL level): receive data output port to flash watchdog MCU

GND--

Ground

Function

Jetson TX1

Description

GND

Ground

25V-

5V power supply to the fan

FAN_ TACH

B17

tachometer from the fan (open drain input with 100k pull-up to 1.8V)

FAN_ PWM

C16

PWM control to the fan (open drain output: controlled by FAN_PWM and „disable fan“ with GPIO19 - F2)

Function

Jetson TX1

Description

power in 1

power input: typical 12V (range: 7V to 17V)

power in 2

power input: typical 12V (range: 7V to 17V)

GND

power ground

GND

power ground

AUVIDEA GMBH

TECHNICAL REFERENCE MANUAL

Page 21

VERSION 1.9

J120 (38198-X)

I2S (J16)

This is a 6 pin connector with 1.25 mm pitch. All signals are covered from 1.8V (TX1) to 3.3V (connector) with a bi-directional level converter. The data direction is automatically determined by the level converter.

J120 rev 1, 2, 3 and 4:

J120 rev 5 (38198-5) and newer:

SPI/I2C (J13)

This is a 10 pin connector with 1.25 mm pitch.

Note: J120 rev 1, 2, and 3: pin 8 and pin 9 have 1k pullup (rev 4 and newer: 10k)

Function

Jetson TX1

GPIO

Description

3.3V--

3.3V power supply

I2S_MCLK

GPIO3_PBB.00

digital audio interface: master clock (3.3V)

I2S2_SING6-

digital audio interface 0: audio input (3.3V)

I2S2_CLKG5-

digital audio interface 0: bit clock (3.3V)

I2S2_LRCLKH5-

digital audio interface 0: word clock (3.3V)

GND--

Ground

Function

Jetson TX1

GPIO

Description

3.3V--

3.3V power supply

I2S_MCLK

GPIO3_PBB.00

digital audio interface: master clock (3.3V)

I2S0_SIN

GPIO3_PB.01

digital audio interface 0: audio input (3.3V)

I2S0_CLK

GPIO3_PB.03

digital audio interface 0: bit clock (3.3V)

I2S0_LRCLK

GPIO3_PB.00

digital audio interface 0: word clock (3.3V)

GND--

Ground

Function

Jetson TX1

GPIO

Description

5.0V--

5.0V power supply

SPI2_CLK

H14