BeagleBone For Dummies (2015)

Appendix C

Guide to the BeagleBone’s GPIOs

The tables in this appendix provide you a quick way to see the signal name of each pin of your BeagleBone’s expansion headers. Throughout this book, we use just a few general purpose input/output (GPIOs), but it’s important to know that you can use the other GPIOs in your projects!

Table C-1 BeagleBone Expansion Header P8

*Pin*	*Signal Name*
1	GND
2	GND
3	GPIO1_6
4	GPIO1_7
5	GPIO1_2
6	GPIO1_3
7	TIMER4
8	TIMER7
9	TIMER5
10	TIMER6
11	GPIO1_13
12	GPIO1_12
13	EHRPWM2B
14	GPIO0_26
15	GPIO1_15
16	GPIO1_14
17	GPIO0_27
18	GPIO2_1
19	EHRPWM2A
20	GPIO1_31
21	GPIO1_30
22	GPIO1_5
23	GPIO1_4
24	GPIO1_1
25	GPIO1_0
26	GPIO1_29
27	GPIO2_22
28	GPIO2_24
29	GPIO2_23
30	GPIO2_25
31	UART5_CTSN
32	UART5_RTSN
33	UART4_RTSN
34	UART3_RTSN
35	UART4_CTSN
36	UART3_CTSN
37	UART5_TXD
38	UART5_RXD
39	GPIO2_12
40	GPIO2_13
41	GPIO2_10
42	GPIO2_11
43	GPIO2_8
44	GPIO2_9
45	GPIO2_6
46	GPIO2_7

Table C-2 BeagleBone Expansion Header P9

*Pin*	*Signal Name*
1	GND
2	GND
3	VDD_3V3
4	VDD_3V3
5	VDD_5V
6	VDD_5V
7	SYS_5V
8	SYS_5V
9	PWR_BUT
10	SYS_RESETn
11	UART4_RXD
12	GPIO1_28
13	UART4_TXD
14	EHRPWM1A
15	GPIO1_16
16	EHRPWM1B
17	I2C1_SCL
18	I2C1_SDA
19	I2C2_SCL
20	I2C2_SDA
21	UART2_TXD
22	UART2_RXD
23	GPIO1_17
24	UART1_TXD
25	GPIO3_21
26	UART1_RXD
27	GPIO3_19
28	SPI1_CS0
29	SPI1_D0
30	SPI1_D1
31	SPI1_SCLK
32	VDD_ADC
33	AIN4
34	GNDA_ADC
35	AIN6
36	AIN5
37	AIN2
38	AIN3
39	AIN0
40	AIN1
41	GPIO3_20
42	GPIO0_7
43	GND
44	GND
45	GND
46	GND

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