beagle bone black pinout
Below is the default LINX mapping for the BeagleBone Black expansion headers. The tables preserve the original color coding so you can quickly distinguish power rails, UART/SPI/I²C buses, PWM outputs, analog inputs, and reserved pins.
| P9 | |||
|---|---|---|---|
| Left Pin | Pin | Pin | Right Pin |
 DGND |
47 | 48 |
DGND |
 VDD_3v3
|
49 | 50 |
VDD_3v3
|
 VDD_5v
|
51 | 52 |
VDD_5v
|
 SYS_5v
|
53 | 54 |
SYS_5v
|
 PWR_BUT |
56 | 55 |
SYS_RESET |
 UART4_RX |
57 | 58 |
 DIO_58 |
|
UART4_TX |
59 | 60 |
 PWM_60 |
|
DIO_61 |
61 | 62 |
PWM_62 |
 RESERVED_SPI0_CS0 |
63 | 64 |
 SPI0_MOSI |
 I2C2_SCL |
65 | 66 |
I2C2_SDA |
|
SPI0_MISO |
67 | 68 |
SPI0_SCLK |
|
DIO_69 |
69 | 70 |
UART1_TX |
|
RESERVED_PRU |
71 | 72 |
UART1_RX |
|
DIO_73 |
73 | 74 |
RESERVED_HDMI |
|
RESERVED_HDMI |
75 | 76 |
DIO_76 |
|
RESERVED_HDMI |
77 | 78 |
 ADC_VDD |
 AI_4 |
79 | 80 |
ADC_GND |
|
AI_6 |
81 | 82 |
AI_5 |
|
AI_2 |
83 | 84 |
AI_3 |
|
AI_0 |
85 | 86 |
AI_1 |
|
RESERVED_PRU |
87 | 88 |
RESERVED_PRU |
|
DGND |
89 | 90 |
DGND |
|
DGND |
91 | 92 |
DGND |
| P8 | |||
|---|---|---|---|
| Left Pin | Pin | Pin | Right Pin |
|
DGND |
1 | 2 |
DGND |
|
RESERVED_MMC |
3 | 4 |
RESERVED_MMC |
|
RESERVED_MMC |
5 | 6 |
RESERVED_MMC |
|
DIO_7 |
7 | 8 |
DIO_8 |
|
DIO_9 |
9 | 10 |
DIO_10 |
|
DIO_11 |
11 | 12 |
DIO_12 |
|
PWM_13 |
13 | 14 |
RESERVED |
|
DIO_15 |
15 | 16 |
DIO_16 |
|
DIO_17 |
17 | 18 |
DIO_18 |
|
PWM_19 |
19 | 20 |
RESERVED_MMC |
|
RESERVED_MMC |
21 | 22 |
RESERVED_MMC |
|
RESERVED_MMC |
23 | 24 |
RESERVED_MMC |
|
RESERVED_MMC |
25 | 26 |
DIO_26 |
|
RESERVED_HDMI |
27 | 28 |
RESERVED_HDMI |
|
RESERVED_HDMI |
29 | 30 |
RESERVED_HDMI |
|
RESERVED_HDMI |
31 | 32 |
RESERVED_HDMI |
|
RESERVED_HDMI |
33 | 34 |
RESERVED_HDMI |
|
RESERVED_HDMI |
35 | 36 |
RESERVED_HDMI |
|
RESERVED_HDMI |
37 | 38 |
RESERVED_HDMI |
|
RESERVED_HDMI |
39 | 40 |
RESERVED_HDMI |
|
RESERVED_HDMI |
41 | 42 |
RESERVED_HDMI |
|
RESERVED_HDMI |
43 | 44 |
RESERVED_HDMI |
|
RESERVED_HDMI |
45 | 46 |
RESERVED_HDMI |
Color legend
| Chip | Signal |
|---|---|
|
3.3 V |
|
5 V / SYS 5 V |
|
UART |
|
SPI |
|
I2C |
|
LINX DIO |
|
PWM |
|
Analog input / ADC |
|
Power control |
|
Ground |
|
Reserved / not connected |
> Tip: Many P8 pins remain reserved for MMC/HDMI by default. If you need additional I/O, disable the conflicting cape overlays in your BeagleBone Black device tree before repurposing those pins.