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Jetson Orin Nano Expansion Header J12 Pinout

By default, I2C and UART pins are assigned. All other pins (except power and ground) are assigned as GPIO. Pins labeled with other functions below are suggested functions.

Sysfs GPIO Name Pin Pin Name Sysfs GPIO
3.3 VDC
Power
1
2
5.0 VDC
Power
I2C1_SDA
I2C Bus 7
3
4
5.0 VDC
Power
I2C1_SCL
I2C Bus 7
5
6
GND
144
gpio492
GPIO9
AUDIO_MCLK
7
8
UART1_TX
/dev/ttyTHS0
GND
9
10
UART1_RX
/dev/ttyTHS0
112
gpio460
UART1_RTS
11
12
I2S0_SCLK 50
gpio398
122
gpio470
SPI1_SCK
13
14
GND
85
gpio433
GPIO12
Alt: PWM
15
16
SPI1_CS1 126
gpio474
3.3 VDC
Power
17
18
SPI1_CS0 125
gpio473
135
gpio483
SPI0_MOSI
19
20
GND
134
gpio482
SPI0_MISO
21
22
SPI1_MISO 123
gpio471
133
gpio481
SPI0_SCK
23
24
SPI0_CS0 136
gpio484
GND
25
26
SPI0_CS1 137
gpio485
I2C0_SDA
I2C Bus 1
27
28
I2C0_SCL
I2C Bus 1
105
gpio453
GPIO01
29
30
GND
106
gpio454
GPIO11

31
32
GPIO07
Alt: PWM
41
gpio389
43
gpio391
GPIO13
Alt: PWM
33
34
GND
53
gpio401
I2S0_FS
35
36
UART1_CTS 113
gpio461
124
gpio472
SPI1_MOSI
37
38
I2S0_SDIN 52
gpio400
GND
39
40
I2S0_SDOUT 51
gpio399
Jetson Orin Expansion Header J12 - Pin 1
Jetson Orin Expansion Header J12 – Pin 1

Notes

I2C

Pins 3 and 5 are on I2C bus 7

For detection:

$ sudo i2cdetect -y -r 7

Pins 27 and 28 are on I2C bus 1. For detection:

$ sudo i2cdetect -y -r 1

On I2C bus 1, there are existing devices on 0x40, 0x25. These are denoted as UU by i2cdetect

4-26-2023 – Preliminary

  • Same layout as Xavier NX
  • There are two GPIO bases 316 & 348. All pins are based from 348
  • First number is the GPIO number within a GPIO controller
  • Second ( gpioXXXX ) is the global Linux GPIO number
  • Pin 15 – When configured as PWM:
    • PWM chip sysfs directory: /sys/devices/3280000.pwm
    • PWM ID within PWM chip: 0
  • Pin 33 – When configured as PWM:
    • PWM chip sysfs directory: /sys/devices/32c0000.pwm
    • PWM ID within PWM chip: 0

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