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ROCK 4A/4B Plus

This is the documentation for ROCK 4A/4B Plus, written by Radxa Team with community contributions.

ROCK 4A/4B Plus is powered by OP1 with a dual core Cortex-A72@2.0GHz + quad core Cortex-A53@1.5Ghz ARM processor, 64bit LPDDR4, up to 4K@60 HDMI, MIPI DSI, MIPI CSI, 3.5mm jack with mic, USB Port, GbE LAN, 40-pin color expansion header, RTC. ROCK 4 SE is introduced in 2022.

Close look of ROCK 4A/4B Plus




Model ROCK 4A/4B Plus
Processor 64bits hexa core processor
Rockchip RK3399-T
Dual Cortex-72, frequency 2.0GHz with qual Cortex-A53, frequency 1.5GHz
Mali T860MP4 gpu, support OpenGL ES 1.1/2.0/3.0/3.1/3.2, Vulkan 1.0, Open CL 1.1 1.2, DX11.
Memory LPDDR4
64bit dual channel LPDDR4@3200Mb/s, 1GB/2GB/4GB optioal
Storage eMMC connector
μSD card (μSD slot supports up to 256 GB μSD card)
M.2 SSD (M.2 connector supports up to 2T M2 NVME SSD)
Display Standard HDMI 2.0 up to 4k@60
MIPI DSI 2 lanes via FPC connector
HDMI and MIPI DSI can work at the same time, support mirror mode or extend mode.
Audio 3.5mm jack with mic
HD codec that supports up to 24-bit/96KHz audio.
Camera MIPI CSI 2 lanes via FPC connector, support up to 800 MP camera(1mm pitch connector).
Wireless 802.11 ac wifi
BT 5.0
with on board or external antenna
USB USB 3.0 OTG X1, hardware switch for host/device switch, upper one
USB 3.0 HOST X1, dedicated USB 3.0 channel, lower one
Ethernet GbE LAN with Power over Ethernet (PoE) support
additional HAT is required for powering from PoE
IO 40-pin expansion header
2 x UART
2 x SPI bus
3 x I2C bus
1 x PCM/I2S
2 x PWM
1 x ADC
6 x GPIO
2 x 5V DC power in
2 x 3.3V DC power in
Others RTC
RTC battery connector for time backup(optional)
Power USB PD, support USB Type C PD 2.0, 9V/2A, 12V/2A.
Qualcomm® Quick ChargeTM: Supports QC 3.0/2.0 adapter, 9V/2A, 12V/1.5A
Size 85mm x 54mm

Getting start guide

Follow the Guide to start using your ROCK 4A/4B Plus.

Use Radxa Debian

Follow the Radxa Debian Guide

Download and install third party OS

Find more OS by the Radxa friends and the community.

Find supported accessories

Discover the accessories that just work on ROCK 4A/4B Plus

Learn more about the hardware details

Learn more about the ROCK 4A/4B Plus connectors and pinout

Check the data sheets of the components used on ROCK 4A/4B Plus.