GPIO Pin分布
下表介绍了GPIO Pin、映射图以及每个引脚的功能说明：
| dts | sys | 引脚名 | 序号 | 序号 | 引脚名 | sys | dts |
|---|---|---|---|---|---|---|---|
| 3.3V电压 | 1 | 2 | 5V电压 | ||||
| i2c1 | i2c-1 | GPIO48 (I2C SDA) | 3 | 4 | 5V电压 | ||
| i2c1 | i2c-1 | GPIO47 (I2C SCL) | 5 | 6 | GND | ||
| 494 | GPIO46 | 7 | 8 | GPIO14 (UART TX) | ttyS0 | uart3 | |
| GND | 9 | 10 | GPIO13 (UART RX) | ttyS0 | uart3 | ||
| 492 | GPIO44 | 11 | 12 | GPIO45 | PWM2 | ||
| 470 | GPIO22 | 13 | 14 | GND | |||
| 468 | GPIO20 | 15 | 16 | GPIO21 | 469 | ||
| 3.3V电压 | 17 | 18 | GPIO19 | 467 | |||
| spi2 | spidev0.0 | GPIO18 (SPI MOSI) | 19 | 20 | GND | ||
| spi2 | spidev0.0 | GPIO16 (SPI MISO) | 21 | 22 | GPIO17 | 465 | |
| spi2 | spidev0.0 | GPIO12 (SPI SCLK) | 23 | 24 | GPIO15 (SPI CE0) | spidev0.0 | spi2 |
| GND | 25 | 26 | GPIO11 (SPI CE1) | spidev0.0 | spi2 | ||
| 457 | GPIO9 | 27 | 28 | GPIO10 | 458 | ||
| 456 | GPIO8 | 29 | 30 | GND | |||
| 454 | GPIO6 | 31 | 32 | GPIO7 (PWM0) | PWM0 | ||
| PWM1 | GPIO5 (PWM1) | 33 | 34 | GND | |||
| 451 | GPIO3 | 35 | 36 | GPIO4 | 452 | ||
| 449 | GPIO1 | 37 | 38 | GPIO2 | 450 | ||
| GND | 39 | 40 | GPIO0 | 448 |