Jetson TX2 J21 Header
GPIO16The GPIO numbering is different than the Jetson TX1 table.
| Jetson TX2 J21 Header | |||||
|---|---|---|---|---|---|
| Sysfs GPIO | Name | Pin | Pin | Name | Sysfs GPIO |
| 3.3 VDC Power |
1
|
2
|
5.0 VDC Power |
||
| I2C_GP_DAT General I2C #0 Data 3.3.V |
3
|
4
|
5.0 VDC Power |
||
| I2C_GP_CLK General I2C #0 Clock 3.3.V |
5
|
6
|
GND | ||
| AUDIO_MCLK Audio Master Clock (1.8/3.3.V) |
7
|
8
|
UART0_TX UART #0 Transmit |
||
| GND |
9
|
10
|
UART0_RX UART #0 Receive |
||
| UART0_RTS# UART #0 Request to Send |
11
|
12
|
I2S0_SCLK Audio I2S #0 Clock |
||
| GPIO_PE6 Audio Code Interrupt |
13
|
14
|
GND | ||
| GPIO_EXP_P17_3V3 From GPIO Expander (P17) |
15
|
16
|
AO_DMIC_IN_DAT_LVL Unused |
||
| 3.3 VDC Power |
17
|
18
|
GPIO16_MDM_WAKE_AP Modem Wake AP GPIO |
gpio481 | |
| SPI_MOSI SPI #1 Master Out/Slave In |
19
|
20
|
GND | ||
| SPI1_MISO SPI #1 Master In/Slave Out |
21
|
22
|
GPIO_EXP_P16_3V3 From GPIO Epander (P16) |
||
| SPI_CLK SPI #1 Shift Clock |
23
|
24
|
SPI1_CS0# SPI #1 Chip Select #0 |
||
| GND |
25
|
26
|
SPI1_CS1# SPI #1 Chip Select #1 |
||
| I2C_GP1_DAT General I2C #1 Data (3.3V) |
27
|
28
|
I2C_GP1_CLK General I2C #1 Clock (3.3V) |
||
| gpio398 | GPIO19_AUD_RST Audio Reset (1.8/3.3V) |
29
|
30
|
GND | |
| gpio298 | GPIO9_MOTION_INT Motion Interrupt (3.3V) |
31
|
32
|
AO_DMIC_IN_CLK Unused |
|
| gpio389 | GPIO11_AP_WAKE_BT AP Wake Bt GPIO |
33
|
34
|
GND | |
| I2S0_LRCLK AUDIO I2S #0 Left/Right Clock |
35
|
36
|
UART0_CTS# UART #0 Clear to Send |
||
| gpio388 | GPIO8_ALS_PROX_INT (3.3V) |
37
|
38
|
I2S0_SDIN Audio I2S #0 Data in |
|
| GND |
39
|
40
|
I2S0_SDOUT Audio I2S #0 Data in |
||
You can download the TX2 pinmux file to find the pin name and reference to tegra186-gpio.h to find the pin number.
For example the pin 37 "GPIO8/ALS_PROX_INT" for TX2 is GPIO PQ4 then the pin number is 320 + (8x16 +4) = 452