Difference between revisions of "Zero2/Hardware/GPIO"

Revision as of 08:51, 5 January 2022

English

 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.

Function4	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	Function4
			+3.3V	1	2	+5.0V
		I2C_EE_M3_SDA	GPIOA_14	3	4	+5.0V
	I2C_EE_M3_SCL	IR_REMOTE_IN	GPIOA_15	5	6	GND
		PWM_D	GPIOZ_2	7	8	GPIOAO_0	UART_AO_A_TX
			GND	9	10	GPIOAO_1	UART_AO_A_RX
			GPIOZ_3	11	12	GPIOA_1
			GPIOZ_4	13	14	GND
			GPIOZ_5	15	16	NC
			+3.3V	17	18	GPIOZ_6
	SPI_B_MOSI	UART_EE_C_RTS	GPIOH_4	19	20	GND
	PWMAO_D	IR_REMOTE_IN	GPIOAO_5	21	22	SARADC_CH3
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
			GND	25	26	SARADC_CH2
		I2C_EE_M0_SDA	GPIOZ_0	27	28	GPIOZ_1	I2C_EE_M0_SCL
			GPIOAO_7	29	30	GND
			GPIOA_13	31	32	GPIOA_0	MCLK_0
		UART_AO_B_TX	GPIOAO_8	33	34	GND
			GPIOA_2	35	36	GPIOC_7
	MCLK_0	UART_AO_B_RX	GPIOAO_9	37	38	GPIOA_5
			GND	39	40	GPIOZ_7	I2C_EE_M0_SDA

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 39: / Line 39: @@
 |
 |-
-| 490
+|
 |
 |
@@ Line 53: / Line 53: @@
 |
 |-
-| 491
 |
 |
 | I2C_EE_M3_SCL
+| IR_REMOTE_IN
 | GPIOA_15
 | style="background-color:#008000; color:#FFF;" | 5
@@ Line 67: / Line 67: @@
 |
 |-
-| 415
+|
-| I2C_AO_S0_SDA
+|
-| UART_AO_B_RX
+|
-| I2C_AO_M0_SDA
+| PWM_D
-| GPIOAO_3
+| GPIOZ_2
 | style="background-color:#008000; color:#FFF;" | 7
 |
 | style="background-color:#008000; color:#FFF;" | 8
 | GPIOAO_0
-| style="background-color:#FFA500;" | UART_AO_A_TXD
+| UART_AO_A_TX
+|
 |
 |
-| 412
 |-
 |
@@ Line 90: / Line 90: @@
 | style="background-color:#008000; color:#FFF;" | 10
 | GPIOAO_1
-| style="background-color:#FFA500;" | UART_AO_A_RXD
+| UART_AO_A_RX
+|
 |
 |
-| 413
 |-
-| 414
+|
-| I2C_AO_S0_SCL
+|
-| UART_AO_B_TX
+|
-| I2C_AO_M0_SCL
+|
-| GPIOAO_2
+| GPIOZ_3
 | style="background-color:#008000; color:#FFF;" | 11
 |
 | style="background-color:#008000; color:#FFF;" | 12
-| GPIOX_9
+| GPIOA_1
-| SPI_A_MISO
+|
+|
 |
 |
-| 501
 |-
-| 503
 |
-| I2C_EE_M1_SCL
+|
-| SPI_A_SCLK
+|
-| GPIOX_11
+|
+| GPIOZ_4
 | style="background-color:#008000; color:#FFF;" | 13
 |
@@ Line 127: / Line 127: @@
 |
 |
-| SARADC_CH1
+| GPIOZ_5
 | style="background-color:#008000; color:#FFF;" | 15
 |
 | style="background-color:#008000; color:#FFF;" | 16
-| GPIOX_10
+| NC
-| SPI_A_SS0
+|
-| I2C_EE_M1_SDA
+|
+|
 |
-| 502
 |-
 |
@@ Line 145: / Line 145: @@
 |
 | style="background-color:#008000; color:#FFF;" | 18
-| GPIOX_8
+| GPIOZ_6
-| SPI_A_MOSI
+|
-| PWM_C
+|
+|
 |
-| 500
 |-
-| 447
+|
 |
 | SPI_B_MOSI
@@ Line 165: / Line 165: @@
 |
 |-
-| 448
+|
-| PWM_F
+|
-| SPI_B_MISO
+| PWMAO_D
-| UART_EE_C_CTS
+| IR_REMOTE_IN
-| GPIOH_5
+| GPIOAO_5
 | style="background-color:#008000; color:#FFF;" | 21
 |
 | style="background-color:#008000; color:#FFF;" | 22
-| GPIOC_7
+| SARADC_CH3
-| -
+|
+|
 |
 |
-| 475
 |-
-| 450
+|
 | I2C_EE_M1_SCL
 | SPI_B_SCLK
@@ Line 191: / Line 191: @@
 | SPI_B_SS0
 | I2C_EE_M1_SDA
-| 449
+|
 |-
 |
@@ Line 207: / Line 207: @@
 |
 |-
-| 415
-| I2C_AO_S0_SDA
-| UART_AO_B_RX
-| I2C_AO_M0_SDA
-| GPIOAO_3
-| style="background-color:#00F; color:#FFF;" | 27
 |
-| style="background-color:#00F; color:#FFF;" | 28
+|
-| GPIOAO_2
+|
-| I2C_AO_M0_SCL
+| I2C_EE_M0_SDA
-| UART_AO_B_TX
+| GPIOZ_0
-| I2C_AO_S0_SCL
+| style="background-color:#008000; color:#FFF;" | 27
-| 414
+|
+| style="background-color:#008000; color:#FFF;" | 28
+| GPIOZ_1
+| I2C_EE_M0_SCL
+|
+|
+|
 |-
 |
@@ Line 225: / Line 225: @@
 |
 |
-| NC
+| GPIOAO_7
 | style="background-color:#008000; color:#FFF;" | 29
 |
@@ Line 239: / Line 239: @@
 |
 |
-| NC
+| GPIOA_13
 | style="background-color:#008000; color:#FFF;" | 31
 |
 | style="background-color:#008000; color:#FFF;" | 32
-| GPIOAO_4
+| GPIOA_0
-| PWMAO_C
+| MCLK_0
+|
 |
 |
-| 416
 |-
 |
 |
 |
-|
+| UART_AO_B_TX
-| NC
+| GPIOAO_8
 | style="background-color:#008000; color:#FFF;" | 33
 |
@@ Line 263: / Line 263: @@
 |
 |-
-| 420
 |
 |
-| UART_AO_B_TX
+|
-| GPIOAO_8
+|
+| GPIOA_2
 | style="background-color:#008000; color:#FFF;" | 35
 |
 | style="background-color:#008000; color:#FFF;" | 36
-| GPIOH_8
+| GPIOC_7
-| -
+|
+|
 |
 |
-| 451
 |-
-| 421
 |
 |
+| MCLK_0
 | UART_AO_B_RX
 | GPIOAO_9
@@ Line 285: / Line 285: @@
 |
 | style="background-color:#008000; color:#FFF;" | 38
-| GPIOAO_10
+| GPIOA_5
-| PWMAO_D
+|
+|
 |
 |
-| 422
 |-
 |
@@ Line 299: / Line 299: @@
 |
 | style="background-color:#008000; color:#FFF;" | 40
-| GPIOAO_11
+| GPIOZ_7
-| PWMAO_A
+| I2C_EE_M0_SDA
+|
 |
 |
-| 423
 |}