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Linux SBC · SBC
Radxa ROCK 5B
A powerful RK3588 SBC with 40-pin expansion, PCIe, M.2, camera/display connectors, and strong Linux community interest.
Processor
Rockchip RK3588
Logic
3.3 V GPIO
Power
USB-C Power Delivery
Format
High-performance ARM SBC
Check before wiring
- The 40-pin header is not a Raspberry Pi electrical clone.
- Use Radxa's pin tables and overlays for GPIO numbering.
- Power delivery negotiation matters for stable high-load use.
Interfaces
GPIOI2CSPIUARTPWMCSIPCIeUSBEthernet
Source-backed connector
Interactive pin map
Pin map
Connector
40-pin GPIO header
Component side up, 40-pin GPIO header along the top edge
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Hover, tap, or focus a pad to inspect a pin. Use arrow keys to move between pins.
- Official Radxa ROCK 5B hardware-interface table.
- GPIO is 3.3 V; this is not a Raspberry Pi electrical clone.
- SARADC_IN4 has analog input limits that differ from the digital rail.
All 40 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | Power | 3V3 | ||
| 3 | I2C | I2C | I2C7_SDA | |
| 5 | I2C | I2C | I2C7_SCL | |
| 7 | GPIO | |||
| 9 | Ground | GND | ||
| 11 | GPIO | |||
| 13 | GPIO | |||
| 15 | GPIO | |||
| 17 | Power | 3V3 | ||
| 19 | SPI | SPI | SPI0_MOSI | |
| 21 | SPI | SPI | SPI0_MISO | |
| 23 | SPI | SPI | SPI0_CLK | |
| 25 | Ground | GND | ||
| 27 | I2C | I2C | I2C0_SDA | |
| 29 | GPIO | |||
| 31 | GPIO | |||
| 33 | PWM | PWM8 | ||
| 35 | Alt | I2S2_LRCK | ||
| 37 | GPIO | |||
| 39 | Ground | GND | ||
| 2 | Power | 5V | ||
| 4 | Power | 5V | ||
| 6 | Ground | GND | ||
| 8 | UART | UART | UART2_TX | |
| 10 | UART | UART | UART2_RX | |
| 12 | PWM | PWM12 | ||
| 14 | Ground | GND | ||
| 16 | GPIO | |||
| 18 | PWM | PWM5 | ||
| 20 | Ground | GND | ||
| 22 | ADC | |||
| 24 | SPI | SPI | SPI0_CS0 | |
| 26 | SPI | SPI | SPI0_CS1 | |
| 28 | I2C | I2C | I2C0_SCL | |
| 30 | Ground | GND | ||
| 32 | PWM | PWM14 | ||
| 34 | Ground | GND | ||
| 36 | PWM | PWM2 | ||
| 38 | PWM | PWM3 / I2S2_SDI | ||
| 40 | Alt | I2S2_SDO |
Why it matters
- Official Radxa docs include hardware and GPIO resources.
- High CPU/GPU/NPU performance in a maker SBC format.
- M.2 and PCIe make it useful for storage-heavy builds.
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