Difference between revisions of "Zero2/Hardware/GPIO"

Revision as of 09:53, 5 January 2022

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 Radxa Zero 2 >  Hardware >  GPIO

General purpose input-output (GPIO) connector

Radxa Zero 2 has a 40-pin expansion header. Each pin is distinguished by color.

GPIO number	Function5	Function4	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	Function4	Function5
					+3.3V	1	2	+5.0V
			I2C_EE_M3_SDA	WORLD_SYNC	GPIOA_14	3	4	+5.0V
			I2C_EE_M3_SCL	IR_REMOTE_IN	GPIOA_15	5	6	GND
	TDMC_DIN0	TDMC_D0	TSIN_B_VALID	PWM_D	GPIOZ_2	7	8	GPIOAO_0	UART_AO_A_TX
					GND	9	10	GPIOAO_1	UART_AO_A_RX
		TDMC_DIN1	TDMC_D1	TSIN_B_SOP	GPIOZ_3	11	12	GPIOA_1	TDMB_SCLK	TDMB_SLV_SCLK
		TDMC_DIN2	TDMC_D2	TSIN_B_DIN0	GPIOZ_4	13	14	GND
		TDMC_DIN3	TDMC_D3	TSIN_B_CLK	GPIOZ_5	15	16	NC
					+3.3V	17	18	GPIOZ_6	TSIN_B_FAIL	TDMC_FS	TDMC_SLV_FS
			SPI_B_MOSI	UART_EE_C_RTS	GPIOH_4	19	20	GND
TDMB_DIN3	TDMB_D3	PWM_F	SPI_B_MISO	UART_EE_C_CTS	GPIOH_5	21	22	SARADC_CH3
	PWM_B	I2C_EE_M1_SCL	SPI_B_SCLK	UART_EE_C_TX	GPIOH_7	23	24	GPIOH_6	UART_EE_C_RX	SPI_B_SS0	I2C_EE_M1_SDA	IR_REMOTE_OUT
					GND	25	26	SARADC_CH2
			PWM_B	I2C_EE_M0_SDA	GPIOZ_0	27	28	GPIOZ_1	I2C_EE_M0_SCL	PWM_C
		TDMB_SLV_FS	TDMB_FS	TSIN_A_DIN0	GPIOAO_7	29	30	GND
			TDMC_SLV_FS	TDMC_FS	GPIOA_13	31	32	GPIOA_0	MCLK_0
	TDMB_SLV_SCLK	TDMB_SCLK	TSIN_A_CLK	UART_AO_B_TX	GPIOAO_8	33	34	GND
			TDMB_SLV_FS	TDMB_FS	GPIOA_2	35	36	GPIOC_7	PCIECK_REQN	WORLD_SYNC
	MCLK_0	TSIN_A_VALID	UART_AO_B_RX	IR_REMOTE_OUT	GPIOAO_9	37	38	GPIOA_5	PDM_DIN3	TDMB_DIN2	TDMB_D2
					GND	39	40	GPIOZ_7	I2C_EE_M0_SDA	TSIN_B_DIN1	TDMC_SCLK	TDMC_SLV_SCLK

More details about 40-pin Header

Pins marked with orange color are designed for debug console.
I2C: x3; I2C_EE_M1 (/dev/i2c-1), I2C_EE_M3 (/dev/i2c-3), I2C_AO_M0 (/dev/i2c-4)
PWM: x3; PWMAO_A, PWM_C
SPI: x2; SPI_A (/dev/spi0.0), SPI_B(/dev/spi1.0)
UART: x3; UART_AO_A (/dev/ttyAML0), UART_AO_B (/dev/ttyAML1), UART_EE_C (/dev/ttyAML4)
Pin#22 (GPIOC_7) and Pin#36 (GPIOH_8) are not available in the user space.

GPIO number

GPIOs are grouped in two banks, GPIO AO domain and GPIO EE domain
- AO domain: GPIOAO_0 - GPIOAO_11
- EE domain: GPIOA_14 - GPIOA_15 | GPIOH_0 - GPIOH_8 | GPIOX_0 - GPIOX_19
UARTs
- AO domain: UARTAO_A | UARTAO_B
- EE domain: UART_A | UART_B | UART_C

GPIO Chip	GPIO Name	Base	Offset	Formula
First	GPIOAO_x	412	0-11	Base + Offset
First	GPIOE_x	424	0-2	Base + Offset
Second	GPIOZ_x	427	0-15	Base + Offset
Second	GPIOH_x	443	0-8	Base + Offset
Second	BOOT_x	452	0-15	Base + Offset
Second	GPIOC_x	468	0-7	Base + Offset
Second	GPIOA_x	476	0-15	Base + Offset
Second	GPIOX_x	492	0-19	Base + Offset

Take GPIOX_10 as an example.

The base is 492 and the offset is 10. So the GPIOX_10's GPIO number is 492+10=502.

@@ Line 43: / Line 43: @@
 |
 |-
-|
 |
 |
 |
 | I2C_EE_M3_SDA
+| WORLD_SYNC
 | GPIOA_14
 | style="background-color:#008000; color:#FFF;" | 3
@@ Line 76: / Line 76: @@
 |-
 |
-|
+| TDMC_DIN0
-|
+| TDMC_D0
-|
+| TSIN_B_VALID
 | PWM_D
 | GPIOZ_2
@@ Line 109: / Line 109: @@
 |
 |
-|
+| TDMC_DIN1
-|
+| TDMC_D1
-|
+| TSIN_B_SOP
 | GPIOZ_3
 | style="background-color:#008000; color:#FFF;" | 11
@@ Line 117: / Line 117: @@
 | style="background-color:#008000; color:#FFF;" | 12
 | GPIOA_1
-|
+| TDMB_SCLK
-|
+| TDMB_SLV_SCLK
 |
 |
@@ Line 125: / Line 125: @@
 |
 |
-|
+| TDMC_DIN2
-|
+| TDMC_D2
-|
+| TSIN_B_DIN0
 | GPIOZ_4
 | style="background-color:#008000; color:#FFF;" | 13
@@ Line 141: / Line 141: @@
 |
 |
-|
+| TDMC_DIN3
-|
+| TDMC_D3
-|
+| TSIN_B_CLK
 | GPIOZ_5
 | style="background-color:#008000; color:#FFF;" | 15
 |
-| style="background-color:#008000; color:#FFF;" | 16
+| style="background-color:#808000; color:#FFF;" | 16
 | NC
 |
@@ Line 165: / Line 165: @@
 | style="background-color:#008000; color:#FFF;" | 18
 | GPIOZ_6
-|
+| TSIN_B_FAIL
-|
+| TDMC_FS
-|
+| TDMC_SLV_FS
 |
 |
@@ Line 187: / Line 187: @@
 |
 |-
-|
+| TDMB_DIN3
-|
+| TDMB_D3
 | PWM_F
 | SPI_B_MISO
@@ Line 253: / Line 253: @@
 |
 |
-|
+| TDMB_SLV_FS
-|
+| TDMB_FS
-|
+| TSIN_A_DIN0
 | GPIOAO_7
 | style="background-color:#008000; color:#FFF;" | 29
@@ Line 270: / Line 270: @@
 |
 |
-|
+| TDMC_SLV_FS
-|
+| TDMC_FS
 | GPIOA_13
 | style="background-color:#008000; color:#FFF;" | 31
@@ Line 284: / Line 284: @@
 |-
 |
-|
+| TDMB_SLV_SCLK
-|
+| TDMB_SCLK
-|
+| TSIN_A_CLK
 | UART_AO_B_TX
 | GPIOAO_8
@@ Line 302: / Line 302: @@
 |
 |
-|
+| TDMB_SLV_FS
-|
+| TDMB_FS
 | GPIOA_2
 | style="background-color:#008000; color:#FFF;" | 35
@@ Line 309: / Line 309: @@
 | style="background-color:#008000; color:#FFF;" | 36
 | GPIOC_7
-|
+| PCIECK_REQN
-|
+| WORLD_SYNC
 |
 |
 |
 |-
-|
 |
 | MCLK_0
+| TSIN_A_VALID
 | UART_AO_B_RX
 | IR_REMOTE_OUT
@@ Line 325: / Line 325: @@
 | style="background-color:#008000; color:#FFF;" | 38
 | GPIOA_5
-|
+| PDM_DIN3
-|
+| TDMB_DIN2
-|
+| TDMB_D2
 |
 |
@@ Line 342: / Line 342: @@
 | GPIOZ_7
 | I2C_EE_M0_SDA
-|
+| TSIN_B_DIN1
-|
+| TDMC_SCLK
-|
+| TDMC_SLV_SCLK
 |
 |}