Jetson TX2 GPIO mapping
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1
Jetson TX2 J21 GPIO Expansion Header Mapping
2
3
Connector
Pin #
Connector
Label
CV-B signal
CV-B/CV-M connector signal
CV-M signalTegra pinHW GPIO
Linux GPIO
Within Chip
Assumed Linux
GPIO Chip Base
Linux GPIONotes
4
13V3
5
25V0
6
3SDA1
I2C_GP0_SDA_3V3_LVL
I2C_GP0_DAT_1V8
I2C_GP0_DATGEN2_I2C_SDA_1V8GPIO_SEN9EE.0149256305Don't use as GPIO
7
45V0
8
5SCL1
I2C_GP0_SCL_3V3_LVL
I2C_GP0_CLK_1V8
I2C_GP0_CLKGEN2_I2C_SCL_1V8GPIO_SEN8EE.0048256304Don't use as GPIO
9
6GND0
10
7GPIO_GCLK
AUDIO_I2S_MCLK_3V3
AUDIO_I2S_MCLK
AUDIO_MCLK
AUDIO_MCLK
AUD_MCLK_L
AUD_MCLKJ.0476320396
11
8TXD0
UART1_TXD_HDR_3V3
UART0_TXD_HDR_1V8
UART0_TXD
UART0_TXUART1_TX_APUART1_TXT.00144320464Don't use as GPIO
12
9GND0
13
10RXD0
UART1_RXD_HDR_3V3
UART0_RXD_HDR_1V8
UART0_RXD
UART0_RXUART1_RX_APUART1_RXT.01145320465Don't use as GPIO
14
11GPIO_GEN0
UART1_RTS_HDR_3V3
UART0_RTS
UART0_RTSUART1_RTS_AP_LUART1_RTST.02146320466
15
12GPIO_GEN1
AUDIO_I2S_SRCLK_3V3
AUDIO_I2S_SRCLK
I2S0_CLK
DAP1_SCLK
DAP1_SCLK_L
DAP1_SCLKJ.0072320392
16
13GPIO_GEN2
AUDIO_CDC_IRQ_LVL
AUDIO_CDC_IRQ
GPIO20_AUD_INTAUD_INT_LGPIO_AUD0J.0577320397
17
14GND
18
15GPIO_GEN3GPIO_EXP_P17_3V3NA (TCA9539 7'h74 )P1715240255
19
16GPIO_GEN4
AO_DMIC_IN_DAT_LVL
AO_DMIC_IN_DAT
AO_DMIC_IN_DAT
AO_DMIC_IN_DAT_1V8
AO_DMIC_IN_DAT_3V3
CAN_GPIO0AA.0040256296
20
173V30
21
18GPIO_GEN5
MDM_WAKE_AP_LVL
MDM_WAKE_AP_1V8
GPIO16_MDM_WAKE_APMODEM_WAKE_APGPIO_MDM2Y.01161320481
22
19SPI_MOSI
SPI1_MOSI_3V3
SPI1_MOSI
SPI1_MOSISPI4_DOUTGPIO_CAM6N.05109320429
23
20GND0
24
21SPIO_MISO
SPI1_MISO_3V3
SPI1_MISO
SPI1_MISOSPI4_DINGPIO_CAM5N.04108320428
25
22GPIO_GEN6GPIO_EXP_P16_3V3NA (TCA9539 7'h74 )P1614240254
26
23SPI_SCLKSPI1_SCK_3V3
SPI1_SCK
SPI1_CLKSPI4_SCKGPIO_CAM4N.03107320427
27
24SPI_CE0_NSPI1_CS0_3V3
SPI1_CS0
SPI1_CS0SPI4_CS0_LGPIO_CAM7N.06110320430
28
25GND
29
26SPI_CE1_NSPI1_CS1_3V3
SPI1_CS1
SPI1_CS1SNN_SPI1_CS1
30
27ID_SDI2C_GP1_DAT_3V3I2C_GP1_DATGEN1_I2C_SDA_3V3GEN1_I2C_SDAC.0622320342Don't use as GPIO
31
28ID_SCI2C_GP1_CLK_3V3I2C_GP1_CLKGEN1_I2C_SCL_3V3GEN1_I2C_SCLC.0521320341Don't use as GPIO
32
29GPIO5AUD_RST_LVL
AUD_RST
GPIO19_AUD_RSTAUD_RST_LGPIO_AUD1J.0678320398
33
30GND
34
31GPIO6
MOTION_INT_AP_L_LVL
MOTION_INT_AP_L
GPIO9_MOTION_INT
MOTION_INT_1V8
MOTION_INT_3V3
CAN_GPIO2AA.0242256298
35
32GPIO12
AO_DMIC_IN_CLK_LVL
AO_DMIC_IN_CLK
AO_DMIC_IN_CLK
AO_DMIC_IN_CLK_1V8
AO_DMIC_IN_CLK_3V3
CAN_GPIO1AA.0141256297
36
33GPIO13
AP_WAKE_BT_3V3
AP_WAKE_BT
GPIO11_AP_WAKE_BTAP2_WAKE_BTGPIO_PQ5I.0569320389
37
34GND
38
35GPIO19
AUDIO_I2S_SFSYNC_3V3
AUDIO_I2S_SFSYNC
I2S0_LRCLKDAP1_FSDAP1_FSJ.0375320395
39
36GPIO16
UART1_CTS_HDR_3V3
UART0_CTS
UART0_CTSUART1_CTS_AP_LUART1_CTST.03147320467
40
37GPIO26SAR_TOUT_LVL
SAR_TOUT
GPIO8_ALS_PROX_INTALS_PROX_INTGPIO_PQ4I.0468320388
41
38GPIO20
AUDIO_I2S_SIN_3V3
AUDIO_I2S_SIN
I2S0_SDINDAP1_DINDAP1_DINJ.0274320394
42
39GND
43
40GPIO21
AUDIO_I2S_SOUT_3V3
AUDIO_I2S_SOUT
I2S0_SDOUTDAP1_DOUTDAP1_DOUTJ.0173320393
44
45
46
47
48
49
50
51
52
53
54
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56
57
58
59
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63
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66
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90
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92
93
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100
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