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Rock3/getting started

< Rock3
Revision as of 07:53, 15 January 2022 by Stephen (Talk | contribs)

Getting Started

This guide is designed for ROCK 3 enthusiast. The purpose is to learn about ROCK 3 series as well as how to prepare and set up for basic use. ROCK 3 has the following models:

  • ROCK 3 Model A (ROCK 3A)
  • ROCK 3 Model B (ROCK 3B)
  • Radxa CM3 IO Board (Radxa ROCK 3 Compute Module + Radxa ROCK 3 Compute Module IO Board)
  • Radxa E23 (Core board: Radxa ROCK 3 Compute Module)
  • Radxa E25 (Core board: Radxa ROCK 3 Plus Compute Module)

When you get a board, you need to know what model it is and which hardware version it is. The information is printed in the top side of the board. We will introduce the board information as much as possible.

Part one: ROCK 3 Model A (ROCK 3A)

What you need


  • ROCK 3 main board
    • ROCK 3 Model A or Model B
  • One of the Storage media below:
    • microSD, larger than 8GB.
  • Power supply
    • The ROCK 3 is powered by Type-C port and has a wide range of input voltage, from 9V to 21V. ROCK 3 supports USB Type-C PD 2.0 with 9V/2A, 12V/2A, 15V/2A and 20V/2A. Besides, the Pi supports QC 3.0/2.0 with 9V/2A and 12V/1.5A.
    • The Type-C cable you using needs to support data communication. We call it USB Type-C charging data cable.
  • USB Keyboard and Mouse
    • With four USB-A connectors, ROCK 3 can be equipped with a full sized keyboard and mouse.
  • Monitor and HDMI Cable
    • ROCK 3 is equipped with a full sized HDMI connector. HDMI capable monitor is recommended.
    • HDMI EDID display data is used to determine the best display resolution. On monitors and TVs that support 1080p (or 4K) this resolution will be selected. If 1080p is not supported the next available resolution reported by EDID will be used. This selected mode will work with MOST but not all monitors/TVs.
  • USB to TTL serial cable
    • ROCK 3 exports a dedicated serial console for CPU, which can access the low level debug message.
  • USB Male A to Male A cable
    • If you want write image on ROCK 3 from USB OTG port or use fastboot/adb commands you need an USB Male A to Male A cable to connect ROCK 3 and PC.


  • microSD Card Reader
    • For flashing the image into microSD Card
  • USB type A to type A cable
    • This is needed for fastboot/adb commands.
  • USB to TTL serial cable
    • This is needed for serial console.
  • Ethernet cable
    • ROCK 3 supports Internet access via WIFI or Ethernet.
    • An Ethernet cable is used to connect your ROCK 3 to a local network and the Internet.
  • Camera Module
    • ROCK 3 supports camera function.
  • LCD Module
    • ROCK 3 supports LCD display function.
  • Audio cable
    • Audio can be played through speaker or headphones using a standard 3.5mm jack.

Close look of ROCK 3A

  • ROCK 3A front view
  • ROCK 3A front with an angle view
  • ROCK 3A back view


Model ROCK 3 Model A


Quad-core Cortex-A55, freqency 2Ghz

Mali G52

Memory 2/4/8GB LPDDR4 3200MT/s, up to 1560MHz
Storage eMMC
μSD card (μSD slot supports up to 128 GB μSD card)
M.2 SSD (M.2 connector supports up to 8TB M2 NVME SSD)
Display HDMI 2.0 up to 4k*2k@60
MIPI DSI 2 lanes via FPC connector
Any two of HDMI, 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.
Wireless None. Optional ROCK Pi Wireless Module
USB USB 3.0 OTG X1, hardware switch for host/device switch, front one
Ethernet GbE LAN with Power over Ethernet (PoE) support
additional HAT is required for powering from PoE
IO 40-pin expansion header
5 x UART
1 x SPI bus
2 x I2C bus
6 x PWM
1 x ADC
1 x CAN
6 x GPIO
2 x 5V DC power in
1 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, 15V/2A, 20V/2A.
Qualcomm® Quick ChargeTM: Supports QC 3.0/2.0 adapter, 9V/2A, 12V/1.5A
Size 85mm x 56mm

Part two: ROCK 3 Model B (ROCK 3B)

Close look of ROCK 3B

  • ROCK 3B front view
  • ROCK 3B front with an angle view
  • ROCK 3B back view

Part three: Radxa CM3 IO

Close look of Radxa CM3 IO

  • Radxa CM3 IO front view
  • Radxa CM3 IO front with an angle view
  • Radxa CM3 IO back view

Part four: Radxa E23

Close look of Radxa E23

  • Radxa E23 front view
  • Radxa E23 front with an angle view
  • Radxa E23 back view

Check Radxa E23 Dual Ethernet Carrier Board for more details including hardware and software information.

Part five: Radxa E25

Close look of Radxa E25

  • Radxa E25 front view
  • Radxa E25 front with an angle view
  • Radxa E25 back view