Difference between revisions of "Zero2/Hardware/GPIO"

Revision as of 09:04, 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.

Function5	Function4	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	Function4	Function5
				+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
	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
				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	IR_REMOTE_OUT	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 12: / Line 12: @@
 |- style="font-weight:bold; text-align:center; background-color:#F2F2F2;"
 ! GPIO number
+! Function5
 ! Function4
 ! Function3
@@ Line 23: / Line 24: @@
 ! Function3
 ! Function4
+! Function5
 ! GPIO number
 |-
+|
 |
 |
@@ Line 34: / Line 37: @@
 | style="background-color:#F00;" | 2
 | +5.0V
+|
 |
 |
@@ Line 39: / Line 43: @@
 |
 |-
+|
 |
 |
@@ Line 48: / Line 53: @@
 | style="background-color:#F00;" | 4
 | +5.0V
+|
 |
 |
@@ Line 53: / Line 59: @@
 |
 |-
+|
 |
 |
@@ Line 62: / Line 69: @@
 | style="background-color:#000; color:#FFF" | 6
 | GND
+|
 |
 |
@@ Line 67: / Line 75: @@
 |
 |-
+|
 |
 |
@@ Line 77: / Line 86: @@
 | GPIOAO_0
 | UART_AO_A_TX
+|
 |
 |
 |
 |-
+|
 |
 |
@@ Line 91: / Line 102: @@
 | GPIOAO_1
 | UART_AO_A_RX
+|
 |
 |
 |
 |-
+|
 |
 |
@@ Line 104: / Line 117: @@
 | style="background-color:#008000; color:#FFF;" | 12
 | GPIOA_1
+|
 |
 |
@@ Line 109: / Line 123: @@
 |
 |-
+|
 |
 |
@@ Line 118: / Line 133: @@
 | style="background-color:#000; color:#FFF" | 14
 | GND
+|
 |
 |
@@ Line 123: / Line 139: @@
 |
 |-
+|
 |
 |
@@ Line 132: / Line 149: @@
 | style="background-color:#008000; color:#FFF;" | 16
 | NC
+|
 |
 |
@@ Line 137: / Line 155: @@
 |
 |-
+|
 |
 |
@@ Line 146: / Line 165: @@
 | style="background-color:#008000; color:#FFF;" | 18
 | GPIOZ_6
+|
 |
 |
@@ Line 151: / Line 171: @@
 |
 |-
+|
 |
 |
@@ Line 160: / Line 181: @@
 | style="background-color:#000; color:#FFF" | 20
 | GND
+|
 |
 |
@@ Line 165: / Line 187: @@
 |
 |-
+|
 |
 | PWM_F
@@ Line 174: / Line 197: @@
 | style="background-color:#008000; color:#FFF;" | 22
 | SARADC_CH3
+|
 |
 |
@@ Line 180: / Line 204: @@
 |-
 |
+| PWM_B
 | I2C_EE_M1_SCL
 | SPI_B_SCLK
@@ Line 191: / Line 216: @@
 | SPI_B_SS0
 | I2C_EE_M1_SDA
+| IR_REMOTE_OUT
 |
 |-
+|
 |
 |
@@ Line 202: / Line 229: @@
 | style="background-color:#008000; color:#FFF;" | 26
 | SARADC_CH2
+|
 |
 |
@@ Line 210: / Line 238: @@
 |
 |
+| PWM_B
 | I2C_EE_M0_SDA
 | GPIOZ_0
@@ Line 217: / Line 246: @@
 | GPIOZ_1
 | I2C_EE_M0_SCL
+| PWM_C
 |
 |
 |
 |-
+|
 |
 |
@@ Line 230: / Line 261: @@
 | style="background-color:#000; color:#FFF" | 30
 | GND
+|
 |
 |
@@ Line 235: / Line 267: @@
 |
 |-
+|
 |
 |
@@ Line 245: / Line 278: @@
 | GPIOA_0
 | MCLK_0
+|
 |
 |
 |
 |-
+|
 |
 |
@@ Line 258: / Line 293: @@
 | style="background-color:#000; color:#FFF" | 34
 | GND
+|
 |
 |
@@ Line 263: / Line 299: @@
 |
 |-
+|
 |
 |
@@ Line 272: / Line 309: @@
 | style="background-color:#008000; color:#FFF;" | 36
 | GPIOC_7
+|
 |
 |
@@ Line 281: / Line 319: @@
 | MCLK_0
 | UART_AO_B_RX
+| IR_REMOTE_OUT
 | GPIOAO_9
 | style="background-color:#008000; color:#FFF;" | 37
@@ Line 286: / Line 325: @@
 | style="background-color:#008000; color:#FFF;" | 38
 | GPIOA_5
+|
 |
 |
@@ Line 291: / Line 331: @@
 |
 |-
+|
 |
 |
@@ Line 301: / Line 342: @@
 | GPIOZ_7
 | I2C_EE_M0_SDA
+|
 |
 |