GPIO Interface

The ROCK Pi E provides a 40-pin GPIO Header.

** Note: Actual compatibility is based on usage. ** ** Note: 40-Pin GPIO for V1.20, V1.21 and V3.0 are functionally identical **

GPIO Number	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	GPIO Number
			+3.3V	1	2	+5.0V
100		UART1_TX	GPIO3_A4	3	4	+5.0V
102		UART1_RX	GPIO3_A6	3	6	GND
60			GPIO1_D4	7	8	GPIO2_A0	UART2_TX		64
			GND	9	10	GPIO2_A1	UART2_RX		65
66		PWM_IR	GPIO2_A2	11	12	GPIO2_C2	PDM_CLK	I2S_SCLK	82
67			GPIO2_A3	13	14	GND
27			GPIO0_D3	15	16	USB20DM
			+3.3V	17	18	USB20DP
97		SPI0_TXD	GPIO3_A1	19	20	GND
98		SPI0_RXD	GPIO3_A2	21	22	ADC_IN1
96		SPI0_CLK	GPIO3_A0	23	24	GPIO3_B0	SPI0_CSN0		104
			GND	25	26	GPIO2_B4			76
68		I2C1_SDA	GPIO2_A4	27	28	GPIO2_A5	I2C1_SCL		69
84	I2S1_SDIO1	PDM_SDI1	GPIO2_C4	29	30	GND
85	I2S1_SDIO2	PDM_SDI2	GPIO2_C5	31	32	GPIO2_C0	I2S1_LRCK_RX		80
70		PWM2	GPIO2_A6	33	34	GND
81		I2S1_LRCK_TX	GPIO2_C1	35	36	GPIO2_B7	I2S1_MCLK		79
86		PDM_SDI3	GPIO2_C6	37	38	GPIO2_C3	PDM_SDIO	I2S1_SDI	83
			GND	39	40	GPIO2_C7	PDM_FSYNC	I2S1_SDO	87