Hardware interface description
Interface overview
Radxa ZERO 3W
Radxa ZERO 3E
Power
Debug Serial Port
Ethernet Port
40 PIN GPIO
GPIO voltage
| GPIO | Voltage | Maximum |
|---|---|---|
| All GPIOs | 3.3V | 3.63V |
| SARADC_IN5 | 3.3V | 3.3V |
GPIO interface
Radxa ZERO 3 provides a 40-pin GPIO header, which is compatible with most SBC accessories on the market.
Tips: Actual compatibility is based on usage
caution
Pin 3 and Pin 5 add extra pull-up resistors for I2C device power supply, so they work abnormally when used as GPIOs.
| GPIO number | Function5 | Function4 | Function3 | Function2 | Function1 | Pin# | Pin# | Function1 | Function2 | Function3 | Function4 | Function5 | GPIO number |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| +3.3V | 1 | 2 | +5.0V | ||||||||||
| 32 | I2C3_SDA_M0 | UART3_RX_M0 | GPIO1_A0 | 3 | 4 | +5.0V | |||||||
| 33 | I2C3_SCL_M0 | UART3_TX_M0 | GPIO1_A1 | 5 | 6 | GND | |||||||
| 116 | PWM14_M0 | GPIO3_C4 | 7 | 8 | GPIO0_D1 | UART2_TX_M0 | 25 | ||||||
| GND | 9 | 10 | GPIO0_D0 | UART2_RX_M0 | 24 | ||||||||
| 97 | GPIO3_A1 | 11 | 12 | GPIO3_A3 | I2S3_SCLK_M0 | 99 | |||||||
| 98 | I2S3_MCLK_M0 | GPIO3_A2 | 13 | 14 | GND | ||||||||
| 104 | GPIO3_B0 | 15 | 16 | GPIO3_B1 | UART4_RX_M1 | PWM8_M0 | 105 | ||||||
| +3.3V | 17 | 18 | GPIO3_B2 | UART4_TX_M1 | PWM9_M0 | 106 | |||||||
| 147 | PWM15_IR_M1 | I2S3_SCLK_M1 | SPI3_MOSI_M1 | GPIO4_C3 | 19 | 20 | GND | ||||||
| 149 | UART9_TX_M1 | PWM12_M1 | I2S3_SDO_M1 | SPI3_MISO_M1 | GPIO4_C5 | 21 | 22 | GPIO3_C1 | I2S1_SDO2_M2 | 113 | |||
| 146 | PWM14_M1 | I2S3_MCLK_M1 | SPI3_CLK_M1 | GPIO4_C2 | 23 | 24 | GPIO4_C6 | SPI3_CS0_M1 | PWM13_M1 | UART9_RX_M1 | I2S3_SDI_M1 | 150 | |
| GND | 25 | 26 | NC | ||||||||||
| 138 | I2C4_SDA_M0 | I2S2_SDI_M1 | GPIO4_B2 | 27 | 28 | GPIO4_B3 | I2C4_SCL_M0 | I2S2_SDO_M1 | 139 | ||||
| 107 | GPIO3_B3 | 29 | 30 | GND | |||||||||
| 108 | GPIO3_B4 | 31 | 32 | GPIO3_C2 | UART5_TX_M1 | I2S1_SDO3_M2 | 114 | ||||||
| 115 | UART5_RX_M1 | I2S1_SCLK_RX_M2 | GPIO3_C3 | 33 | 34 | GND | |||||||
| 100 | I2S3_LRCK_M0 | GPIO3_A4 | 35 | 36 | GPIO3_A7 | 103 | |||||||
| 36 | I2S1_SCLK_RX_M0 | GPIO1_A4 | 37 | 38 | GPIO3_A6 | I2S3_SDI_M0 | 102 | ||||||
| GND | 39 | 40 | GPIO3_A5 | I2S3_SDO_M0 | 101 |