RockpiS/hardware/gpio

    ROCK Pi S >  Hardware >  GPIO

General purpose input-output (GPIO) connector

ROCK Pi S has two 26-pin expansion header. Each pin is distinguished by color, pin name and location are named as bellow.

Hardware V10

26-pin Header 1

GPIO number	Func4	Func3	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	Func4	GPIO number
				+3.3V	1	2	+5.0V
12			I2C1_SCL	GPIO0_B4	3	4	+5.0V
11			I2C1_SDA	GPIO0_B3	5	6	GND
69			I2S0_SCLK_TX	GPIO2_A5	7	8	GPIO4_D3	SDMMC_D3	UART2_TX_M1	PMU_ST3	155
64		SPI0_MISO	UART0_RX	GPIO2_A0	9	10	GPIO4_D2	SDMMC_D2	UART2_RX_M1	PMU_ST2	154
65		SPI0_MOSI	UART0_TX	GPIO2_A1	11	12	GPIO0_C0	PWM3	I2C3_SCL_M0		16
66	I2C2_SDA	SPI0_CLK	UART0_CTSN	GPIO2_A2	13	14	GND
67	I2C2_SCL	SPI0_CSN0	UART0_RTSN	GPIO2_A3	15	16	GPIO2_A7	I2S0_8CH_LRCK_TX			71
				+3.3V	17	18	GPIO2_B1	I2S0_8CH_SDO0			73
55	SPI2_MOSI	UART2_TX_M0	UART1_RTSN	GPIO1_C7	19	20	GND
54	SPI2_MISO	UART2_RX_M0	UART1_CTSN	GPIO1_C6	21	22	GPIO0_B6	PWM1			14
56	SPI2_CLK	I2C0_SDA	UART1_RX	GPIO1_D0	23	24	GPIO1_D1	UART1_TX	I2C0_SCL	SPI2_CSN0	57
				GND	25	26	GPIO0_B7	PWM2	I2C3_SDA_M0		15

Warning

Pin#8 and Pin#10 cannot be used as GPIO, UART function pins since they are the data pins of SDMMC.

26-pin Header 2

Func1	Pin#	Pin#	Func1	Func2	Func3	GPIO number
GND	27	28	GPIO2_A6	I2S0_8CH_SCLK_RX	PDM_CLK_S_M2	70
ADC_KEY_IN1	29	30	GPIO2_B5	I2S0_8CH_SDI0	PDM_SDI0_M2	77
MICBIAS2	31	32	GPIO2_B6	I2S0_8CH_SDI1	PDM_SDI1_M2	78
MICBIAS1	33	34	GPIO2_B7	I2S0_8CH_SDI2	PDM_SDI2_M2	79
MICN8	35	36	MCIP8
MICN7	37	38	MCIP7
MICN6	39	40	MCIP6
MICN5	41	42	MCIP5
MICN4	43	44	MCIP4
MICN3	45	46	MCIP3
MICN2	47	48	MCIP2
MICN1	49	50	MCIP1
LINEOUT_R	51	52	LINEOUT_L

More details about V10 Headers

Pins marked with color orange are designed for default debug console.
PWM: x3, PWM1/PWM2/PWM3
SPI: x2, SPI0/SPI2
I2C: x4, I2C0/I2C1/I2C2/I2C3
UART: x3, UART0/UART1/UART2

Hardware V11

26-pin Header 1

GPIO number	Func4	Func3	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	Func4	GPIO number
				+3.3V	1	2	+5.0V
11			I2C1_SDA	GPIO0_B3	3	4	+5.0V
12			I2C1_SCL	GPIO0_B4	5	6	GND
69			I2S0_SCLK_TX	GPIO2_A5	7	8	GPIO2_A1	UART0_TX	SPI0_MOSI		65
				GND	9	10	GPIO2_A0	UART0_RX	SPI0_MISO		64
15		I2C3_SDA_M0	PWM2	GPIO0_B7	11	12	GPIO2_A2	UART0_CTSN	SPI0_CLK	I2C2_SDA	66
16		I2C3_SCL_M0	PWM3	GPIO0_C0	13	14	GND
17			SPDIF_TX	GPIO0_C1	15	16	GPIO2_A3	UART0_RTSN	SPI0_CSN0	I2C2_SCL	67
				+3.3V	17	18	GPIO2_B1	I2S0_8CH_SDO0			73
55	SPI2_MOSI	UART2_TX_M0	UART1_RTSN	GPIO1_C7	19	20	GND
54	SPI2_MISO	UART2_RX_M0	UART1_CTSN	GPIO1_C6	21	22	GPIO0_B6	PWM1			14
56	SPI2_CLK	I2C0_SDA	UART1_RX	GPIO1_D0	23	24	GPIO1_D1	UART1_TX	I2C0_SCL	SPI2_CSN0	57
				GND	25	26	ADC_IN0

26-pin Header 2

Func1	Pin#	Pin#	Func1	Func2	Func3	GPIO number
GND	27	28	GPIO2_A6	I2S0_8CH_SCLK_RX	PDM_CLK_S_M2	70
ADC_KEY_IN1	29	30	GPIO2_B5	I2S0_8CH_SDI0	PDM_SDI0_M2	77
MICBIAS2	31	32	GPIO2_B6	I2S0_8CH_SDI1	PDM_SDI1_M2	78
MICBIAS1	33	34	GPIO2_B7	I2S0_8CH_SDI2	PDM_SDI2_M2	79
MICN8	35	36	MCIP8
MICN7	37	38	MCIP7
MICN6	39	40	MCIP6
MICN5	41	42	MCIP5
MICN4	43	44	MCIP4
MICN3	45	46	MCIP3
MICN2	47	48	MCIP2
MICN1	49	50	MCIP1
LINEOUT_R	51	52	LINEOUT_L

More details about V11 Headers

Pins marked with color orange are designed for default debug console.
PWM: x3, PWM1/PWM2/PWM3
SPI: x2, SPI0/SPI2
I2C: x4, I2C0/I2C1/I2C2/I2C3
UART: x3, UART0/UART1/UART2
ADC: x1, ADC_IN0. The max input voltage is 1.8V.

Hardware V12

26-pin Header 1

GPIO number	Func4	Func3	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	Func4	GPIO number
				+3.3V	1	2	+5.0V
11			I2C1_SDA	GPIO0_B3	3	4	+5.0V
12			I2C1_SCL	GPIO0_B4	5	6	GND
68		PDM_CLK_M_M2	I2S0_8CH_MCLK	GPIO2_A4	7	8	GPIO2_A1	UART0_TX	SPI0_MOSI		65
				GND	9	10	GPIO2_A0	UART0_RX	SPI0_MISO		64
15		I2C3_SDA_M0	PWM2	GPIO0_B7	11	12	GPIO2_A5	I2S0_8CH_SCLK_TX			69
16		I2C3_SCL_M0	PWM3	GPIO0_C0	13	14	GND
17			SPDIF_TX	GPIO0_C1	15	16	GPIO2_B2	I2S0_8CH_SDO1			74
				+3.3V	17	18	GPIO2_B1	I2S0_8CH_SDO0			73
55	SPI2_MOSI	UART2_TX_M0	UART1_RTSN	GPIO1_C7	19	20	GND
54	SPI2_MISO	UART2_RX_M0	UART1_CTSN	GPIO1_C6	21	22	GPIO2_A7	I2S0_8CH_LRCK_TX			71
56	SPI2_CLK	I2C0_SDA	UART1_RX	GPIO1_D0	23	24	GPIO1_D1	UART1_TX	I2C0_SCL	SPI2_CSN0	57
				GND	25	26	ADC_IN0

26-pin Header 2

GPIO number	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	GPIO number
		GND	27	28	GPIO2_B5	I2S0_8CH_SDI0	PDM_SDI0_M2	77
		ADC_KEY_IN1	29	30	GPIO2_B6	I2S0_8CH_SDI1	PDM_SDI1_M2	78
		MICBIAS2	31	32	GPIO2_B7	I2S0_8CH_SDI2	PDM_SDI2_M2	79
		MICBIAS1	33	34	GPIO2_C0	I2S0_8CH_SDI3	PDM_SDI3_M2	80
		MICN8	35	36	MCIP8
		MICN7	37	38	MCIP7
		MICN6	39	40	MCIP6
		MICN5	41	42	MCIP5
76	I2S0_8CH_SDO3	GPIO2_B4	43	44	GPIO2_B3	I2S0_8CH_SDO2		75
72	I2S0_8CH_LRCK_RX	GPIO2_B0	45	46	GPIO2_A6	I2S0_8CH_SCLK_RX	PDM_CLK_S_M2	70
		MICN2	47	48	MCIP2
		MICN1	49	50	MCIP1
		LINEOUT_R	51	52	LINEOUT_L

More details about V12 Headers

Pins marked with color orange are designed for default debug console.
PWM: x2, PWM2/PWM3
SPI: x1, SPI2
I2C: x3, I2C0/I2C1/I2C3
UART: x3, UART0/UART1/UART2
ADC: x1, ADC_IN0. The max input voltage is 1.8V.

Hardware V13

26-pin Header 1

GPIO number	Func4	Func3	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	Func4	GPIO number
				+3.3V	1	2	+5.0V
11			I2C1_SDA	GPIO0_B3	3	4	+5.0V
12			I2C1_SCL	GPIO0_B4	5	6	GND
68		PDM_CLK_M_M2	I2S0_8CH_MCLK	GPIO2_A4	7	8	GPIO2_A1	UART0_TX	SPI0_MOSI		65
				GND	9	10	GPIO2_A0	UART0_RX	SPI0_MISO		64
15		I2C3_SDA_M0	PWM2	GPIO0_B7	11	12	GPIO2_A5	I2S0_8CH_SCLK_TX			69
16		I2C3_SCL_M0	PWM3	GPIO0_C0	13	14	GND
17			SPDIF_TX	GPIO0_C1	15	16	GPIO2_B2	I2S0_8CH_SDO1			74
				+3.3V	17	18	GPIO2_B1	I2S0_8CH_SDO0			73
55	SPI2_MOSI	UART2_TX_M0	UART1_RTSN	GPIO1_C7	19	20	GND
54	SPI2_MISO	UART2_RX_M0	UART1_CTSN	GPIO1_C6	21	22	GPIO2_A7	I2S0_8CH_LRCK_TX			71
56	SPI2_CLK	I2C0_SDA	UART1_RX	GPIO1_D0	23	24	GPIO1_D1	UART1_TX	I2C0_SCL	SPI2_CSN0	57
				GND	25	26	ADC_IN0

26-pin Header 2

GPIO number	Func4	Func3	Func2	Func1	Pin#	Pin#	Func1	Func2	Func3	Func4	GPIO number
				GND	27	28	GPIO2_B5	I2S0_8CH_SDI0	PDM_SDI0_M2		77
				ADC_KEY_IN1	29	30	GPIO2_B6	I2S0_8CH_SDI1	PDM_SDI1_M2		78
				MICBIAS2	31	32	GPIO2_B7	I2S0_8CH_SDI2	PDM_SDI2_M2		79
				MICBIAS1	33	34	GPIO2_C0	I2S0_8CH_SDI3	PDM_SDI3_M2		80
				MICN8	35	36	MCIP8
				MICN7	37	38	MCIP7
109	UART3_TX	I2C3_SCL_M1	SPI1_CSN0	GPOI3_B5	39	40	GPOI3_B4	SPI1_MOSI	I2C3_SDA_M1	UART3_RX	108
107			SPI1_CLK	GPOI3_B3	41	42	GPOI3_B2	SPI1_MISO			106
76			I2S0_8CH_SDO3	GPIO2_B4	43	44	GPIO2_B3	I2S0_8CH_SDO2			75
72			I2S0_8CH_LRCK_RX	GPIO2_B0	45	46	GPIO2_A6	I2S0_8CH_SCLK_RX	PDM_CLK_S_M2		70
				MICN2	47	48	MCIP2
				MICN1	49	50	MCIP1
				LINEOUT_R	51	52	LINEOUT_L

More details about V13 Headers

The difference between V12 and V13 is determined by PIN#13/14/15/16 on 26-pin Header 2.
Pins marked with color orange are designed for default debug console.
PWM: x2, PWM2/PWM3
SPI: x2, SPI1, SPI2
I2C: x3, I2C0/I2C1/I2C3
UART: x4, UART0/UART1/UART2/UART3
ADC: x1, ADC_IN0. The max input voltage is 1.8V.
When I2C3 is used, you should only select one of the two groups, PIN#11/13 on 26-pin Header 1 and PIN#13/14 on 26-pin Header 2.

IO Voltage

RK3308 have two IO voltages, 1.8V/3.3V. For ROCK Pi S, the voltage level of GPIOs showed in the tables above are 3.3V and tolerance of those are 3.63V. For hardware V11 and V12, an ADC input is included (ADC_IN0). This ADC has an input voltage range of 0-1.8V.

GPIO number

Rockchip RK3308 GPIO has 5 banks, GPIO0 to GPIO4, each bank has 32pins, naming as below:

   GPIO0_A0 ~ A7 
   GPIO0_B0 ~ B7
   GPIO0_C0 ~ C7
   GPIO0_D0 ~ D7
   
   GPIO1_A0 ~ A7
   ....
   GPIO1_D0 ~ D7

For Rockchip 4.4 kernel, the GPIO number can be calculated as below, take GPIO4_D3(PIN8 on 26PIN GPIO) as an example:

   GPIO4_D3 = 32*4 + 8*3 + 3 = 155

To set GPIO4_D3 output

   cd /sys/class/gpio
   echo 155 > export
   cd gpio155
   echo out > direction
   echo 1 > value     # output high
   echo 0 > value     # output low

Power supply

1.The pins, PIN#2 and PIN#4, can supply power of 5V. The maximum current that can output depends on the power adapter.

2.The pins, PIN#1 and PIN#17, can supply power of 3.3V. The maximum current that can output is 200mA.