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Two 3.3V power pins and two 5V power pins. These are not switchable;
power is always available when the developer kit is connected to power.
o Interface signal pins.
By default, all interface signal pins are 3.3V, but some can be configured for
1.8V. See [J24] information below.
L4T provides a Python library, Jetson.GPIO, for controlling GPIOs. The
library has the same API as RPi.GPIO. See /opt/nvidia/jetson-
gpio/doc/README.txt on your Jetson system for details.
By default, all interface signal pins are configured as GPIOs, except pins 3
and 5 and pins 27 and 28, which are I2C SDA and SCL, and pins 8 and 10,
which are UART TX and RX.
Optional
Audio I2S
MCLK
UART RTS
SPI1 MOSI
SPI1 MISO
SPI1 SCLK
Jetson TX2 Developer Kit
Signal
Default
Pin
voltage
3.3V Supply
1 2
I2C1 SDA
3.3V
3 4
I2C1 SCL
3.3V
5 6
3.3V
GPIO
7 8
or 1.8V
Ground
9 10
GPIO
3.3V
11 12
3.3V
GPIO
13 14
or 1.8V
GPIO
3.3V
15 16
3.3V Supply
17 18
3.3V
GPIO
19 20
or 1.8V
3.3V
GPIO
21 22
or 1.8V
3.3V
GPIO
23 24
or 1.8V
Ground
25 26
I2C0 SDA
3.3V
27 28
3.3V
GPIO
29 30
or 1.8V
GPIO
3.3V
31 32
3.3V
GPIO
33 34
or 1.8V
Signal
Default
Optional
voltage
5.0V Supply
5.0V Supply
Ground
3.3V
UART TXD
GPIO
3.3V
UART RXD
GPIO
3.3V
Audio I2S
GPIO
or 1.8V
CLK
Ground
3.3V
Digital Mic
GPIO
or 1.8V
Input
3.3V
GPIO
or 1.8V
Ground
3.3V
GPIO
3.3V
GPIO
SPI1 CS0
or 1.8V
Not Used
3.3V
I2C0 SCL
Ground
3.3V
Digital Mic
GPIO
or 1.8V
Clock
Ground
DA_09452-003 | 7
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