ROCK 4A
A Classic SBC with Dual Display and 4K
ROCK 4B
An Upgraded ROCK 4A SBC with WiFi5 & BT5 and PoE Support
Rockchip RK3399
Arm® big.LITTLE™ technology
Arm® Mali™ T860MP4 GPU
Support OpenGL ES1.1/2.0/3.0/3.1/3.2, OpenCL1.2, DirectX11.1 etc
Experience the Charm of Dual Display and 4K
> Support H.265/VP9 (HEVC) hardware decode (up to 4Kp60)
> Support H.264 hardware decodes (up to 1080p60)
> Standard HDMI ports support displays up to 4K@60fps
> MIPI DSI interface Support 1080p@60fps
*HDMI and MIPI DSI can work at the same time, support mirror mode or extend mode.
Multiple Storage and Booting OS Solution
eMMC, Micro SD Card and M.2 M Key Connector
High Speed and Capacity to Fulfill Diverse Storage Needs
Both Wired and Wireless Connectivity
> Supporting 802.11 b/g/n/ac (Wi-Fi 5) wireless LAN, BT 5.0 with BLE
> Gigabit Ethernet with Power over Ethernet (PoE) support (additional HAT is required for powering from PoE)
Note: Wireless LAN and Bluetooth, as well as PoE-enabled Ethernet, are only available in ROCK 4B. ROCK 4A lacks built-in wireless and PoE capability.
Various Accessories Support
Official Accessories:
Third Party Accessories:
Comprehensive Technical Documentation and
Active Community
Additional Features
 Camera MIPI CSI 2 lanes via FPC connector Support up to 800 MP camera The Camera connector features a compact 1mm pitch |
 Headphone Jack One 3.5mm audio jack (MIC input) HD codec that supports up to 24-bit/96KHz audio |
 USB 2.0 2x USB2 Host ports |
|
USB 3.0 1x USB3 OTG port 1x USB3 HOST port |
 Gigabit Ethernet (ROCK 4A) GbE LAN without Power over Ethernet (PoE) support |
 40x Color GPIO Supporting various interface options: 2 x UART, 2 x SPI bus, 3 x I2C bus, 1 x PCM/I2S, 1 x SPDIF, 2 x PWM, 1 x ADC, 6 x GPIO, 2 x 5V DC power pin, 2 x 3.3V power pin |
Interfaces
Radxa ROCK 4A
Radxa ROCK 4B
Tech Specs
| Specification | Radxa ROCK 4A | Radxa ROCK 4B |
|---|---|---|
| SoC | Rockchip RK3399 | |
| CPU | Dual-Core Cortex-A72 @ 1.8GHz + Quad-Core Cortex-A53 @ 1.4GHz | |
| GPU | Mali-T860MP4 (OpenGL ES 1.1–3.2, Vulkan 1.0, OpenCL 1.1/1.2, DirectX 11.1) | |
| Multimedia | H.265/VP9 4Kp60 decode, H.264 1080p60 decode | |
| RAM | 2GB / 4GB LPDDR4 | 2GB / 4GB LPDDR4 |
| Storage | eMMC, M.2 M Key (PCIe 2.1 x4), microSD | eMMC, M.2 M Key (PCIe 2.1 x4), microSD |
| Display | HDMI (4Kp60), 2-lane MIPI DSI | HDMI (4Kp60), 2-lane MIPI DSI |
| Camera | 1x 2-lane MIPI CSI | 1x 2-lane MIPI CSI |
| Wireless | Not Available | WiFi 5 (802.11ac), Bluetooth 5.0 with BLE |
| Ethernet | Gigabit Ethernet (No PoE) | Gigabit Ethernet with PoE (PoE HAT required) |
| USB | 1x USB3 HOST, 1x USB3 OTG, 2x USB2 HOST | 1x USB3 HOST, 1x USB3 OTG, 2x USB2 HOST |
| Audio | 4-ring 3.5mm Jack, 24-bit/96KHz codec | 4-ring 3.5mm Jack, 24-bit/96KHz codec |
| GPIO | 40-pin GPIO: 2x UART, 2x SPI, 3x I2C, 1x PCM/I2S, 1x SPDIF, 2x PWM, 1x ADC, 6x GPIO, 2x 5V, 2x 3.3V | |
| Software | Debian Linux and Android support | |
| Power Input | USB PD 2.0: 9V/2A, 12V/2A, 15V/2A, 20V/2A QC 2.0/3.0: 9V/2A, 12V/1.5A Fixed voltage 6V–24V via USB-C 5V from GPIO pins 2 & 4 |
|
| Operating Temp | Recommended: 0–50°C; Throttle limit: 80°C; Use heatsink/fan for full performance | |
| Dimensions | 85 mm x 56 mm | |
| Certification | Not Specified | FCC / CE |
Download
Documentation
| Getting Started with your ROCK 4A/4B. | Download |
Product Information
| Product Brief- Radxa ROCK 4A | Download |
| Schematic V1.52- Radxa ROCK 4A | Download |
| SMD V1.52- Radxa ROCK 4A | Download |
| 2D Drawings- Radxa ROCK 4A | Download |
| Product Brief- Radxa ROCK 4B | Download |
| Schematic V1.52- Radxa ROCK 4B | Download |
| SMD V1.52- Radxa ROCK 4B | Download |
| 2D Drawings- Radxa ROCK 4B | Download |
| 3D Drawings - Radxa ROCK 4B | Download |
Official Images
| Debian 11 OS for ROCK 4A | Download |
| Android 11 for ROCK 4A | Download |
| Debian 11 OS for ROCK 4B | Download |
| Android 11 for ROCK 4B | Download |
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Discussion Forum
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