Difference between revisions of "Rockpi4/hardware/gpio"

Revision as of 12:28, 21 March 2019

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    ROCK Pi 4 >  Hardware >  GPIO

General purpose input-output (GPIO) connector

ROCK Pi 4 has a 40-pin expansion header. Each pin is distinguished by color.

GPIO number	Function2	Function1	GPIO	Pin#	Pin#	GPIO	Function1	Function2	GPIO number
		+3.3V		1	2		+5.0V
71		I2C7_SDA	GPIO2_A7	3	4		+5.0V
72		I2C7_SCL	GPIO2_B0	5	6		GND
75		SPI2_CLK	GPIO2_B3	7	8	GPIO4_C4	DEBUG_TXD		148
		GND		9	10	GPIO4_C3	DEBUG_RXD		147
146		PWM0	GPIO4_C2	11	12	GPIO4_A3	I2S1_SCLK		131
150		PWM1	GPIO4_C6	13	14		GND
149		SPDIF_TX	GPIO4_C5	15	16	GPIO4_D2			154
		+3.3V		17	18	GPIO4_D4			156
40	UART4_TXD	SPI1_TXD	GPIO1_B0	19	20		GND
15	UART4_RXD	SPI1_RXD	GPIO1_A7	21	22	GPIO4_D5			157
41		SPI1_CLK	GPIO1_B1	23	24	GPIO1_B2	SPI1_CSn		42
		GND		25	26		ADC_IN0
64		I2C2_SDA	GPIO2_A0	27	28	GPIO2_A1	I2C2_CLK		65
74	I2C6_SCL	SPI2_TXD	GPIO2_B2	29	30		GND
73	I2C6_SDA	SPI2_RXD	GPIO2_B1	31	32	GPIO3_C0	SPDIF_TX	UART3_CTSn	112
76		SPI2_CSn	GPIO2_B4	33	34		GND
133		I2S1_LRCK_TX	GPIO4_A5	35	36	GPIO4_A4	I2S1_LRCK_RX		132
158			GPIO4_D6	37	38	GPIO4_A6	I2S1_SDI		134
		GND		39	40	GPIO4_A7	I2S1_SDO		135

IO Voltage

RK3399 have three IO voltages, 1.8V/3.0V/3.3V. For ROCK Pi 4, below is the default voltage:

| GPIO       | Voltage Level | Tolerance |
| ---------- | ------------- | --------- |
| GPIO3_C0   | 3.3V          | 3.465V    |
| ADC_IN0    | 1.8V          | 1.98V     |
| Other GPIO | 3.0V          | 3.14V     |

GPIO number

Rockchip RK3399 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_D5(PIN22 on 40PIN GPIO) as an example:

   GPIO4_D5 = 32*4 + 8*3 + 5 = 157

To set GPIO4_D5 output

   cd /sys/class/gpio
   echo 157 > export
   cd gpio157
   echo out > direction
   echo 1 > value     # output high
   echo 0 > value     # output low

@@ Line 5: / Line 5: @@
-== <span id="gpio">General purpose input-output (GPIO) connector</span> ==
+=== <span id="gpio">General purpose input-output (GPIO) connector</span> ===
 ROCK Pi 4 has a 40-pin expansion header. Each pin is distinguished by color.
@@ Line 53: / Line 53: @@
 |}
+=== IO Voltage ===
+RK3399 have three IO voltages, 1.8V/3.0V/3.3V. For ROCK Pi 4, below is the default voltage:
+<pre>
+| GPIO       | Voltage Level | Tolerance |
+| ---------- | ------------- | --------- |
+| GPIO3_C0   | 3.3V          | 3.465V    |
+| ADC_IN0    | 1.8V          | 1.98V     |
+| Other GPIO | 3.0V          | 3.14V     |
-Full 40PIN GPIO pinout and numbers can be found at: https://wiki.radxa.com/Rockpi4/hardware/rockpi4#gpio
+</pre>
+=== GPIO number ===
 Rockchip RK3399 GPIO has 5 banks, GPIO0 to GPIO4, each bank has 32pins, naming as below: