Rockpi4/hardware
The ROCK Pi 4 is the lasted SBC released by radxa.
Processor
The Rockchip RK3399 Soc used in ROCK Pi 4 includes 64bits hexa core processor with dual 1.8GHz Cortex-72 and qual 1.4GHz Cortex-A53, Mali T860MP4 graphics processing unit (GPU) and Internal SRAM. It has a level 1 (L1) cache and a level 2 (L2). For level 1 cache, 48KB Icache and 32KB Dcache is for each A72. 32KB Icache and 32KB Dcache is for each A53. For level 2 cache, 1024KB cache is for big cluster and 512KB cache is for little cluster.
Performance
RAM
Networking
Peripherals
Video
Connectors
General purpose input-output (GPIO) connector
ROCK Pi 4 has a 40-pin expansion header. Each pin is distinguished by color.
| Function | GPIO | Pin# | Pin# | GPIO | Function | |
|---|---|---|---|---|---|---|
| +3.3V | 1 | 2 | +5.0V | |||
| I2C7_SDA | GPIO2_A7 | 3 | 4 | +5.0V | ||
| I2C7_SCL | GPIO2_B0 | 5 | 6 | GND | ||
| SPI2_CLK | GPIO2_B3 | 7 | 8 | GPIO4_C4 | UART2_TX | |
| GND | 9 | 10 | GPIO4_C3 | UART2C_RX | ||
| PWM0 | GPIO4_C2 | 11 | 12 | GPIO4_A3 | I2S1_SCLK/PCM-CLK | |
| GPIO4_C6 | 13 | 14 | GND | |||
| GPIO4_C5 | 15 | 16 | GPIO4_D2 | |||
| +3.3V | 17 | 18 | GPIO4_D4 | |||
| SPI1_TXD | GPIO1_B0 | 19 | 20 | GND | ||
| SPI1_RXD | GPIO1_A7 | 21 | 22 | GPIO4_D5 | ||
| SPI1_CLK | GPIO1_B1 | 23 | 24 | GPIO1_B2 | SPI1_CSN0 | |
| GND | 25 | 26 | ADC_IN0 | |||
| I2C2_SDA | GPIO2_A0 | 27 | 28 | GPIO2_A1 | I2C2_CLK | |
| SPI2_TXD | GPIO2_B2 | 29 | 30 | GND | ||
| SPI2_RXD | GPIO2_B1 | 31 | 32 | GPIO3_C0 | SPDIF_TX | |
| SPI2_CSN0 | GPIO2_B4 | 33 | 34 | GND | ||
| I2S1_LRCK_TX/PCM-FS | GPIO4_A5 | 35 | 36 | GPIO4_A4 | I2S1_LRCK_RX | |
| GPIO4_D6 | 37 | 38 | GPIO4_A6 | I2S1_SDIO/PCM-DI | ||
| GND | 39 | 40 | GPIO4_A7 | I2S1_SDO0/PCM-D0 |