Radxa CM3J + Raspberry Compute Module 4 IO Board

Preparation

• Radxa CM3J Core Board + Raspberry Pi Compute Module 4 IO Base Board

CM3J Core Board

Raspberry Pi Compute Module 4 IO Board

• To start the Radxa CM3J + Raspberry Pi Compute Module 4 IO Board, the following items are also required:

  • DC 12V/3A Adapter.
  • An HDMI cable and a display that supports HDMI, with a recommended resolution of 1080P or higher. A 4K display will provide the best experience.
  • A set of USB mouse and keyboard, with common USB input devices supporting plug-and-play.
  • An Ethernet cable, as an internet connection is required for system updates.

tip

It is recommended to use the official power adapter Power DC12 36W

Assembly

Installing the Core Board

First, align the four mounting holes on the core board with the four mounting holes on the io board. Then, gently press down one side to about halfway, followed by pressing the other side to halfway as well. After confirming that all slots are aligned, press down each side to the bottom in sequence.

Note: When pressing, do not forcefully press down on the suspended area in the middle, as this may cause stress on the PCB, leading to component loosening or damage, such as DDR loosening or resistor breakage.

Removing the Core Board

Use tools similar to the following to pry it open from the four corners sequentially. Do not use your hands or tools to forcefully bend it open from the middle or a single side.

Choose Boot Method

Please refer to the Install System section to choose the method for booting your system according to your needs.

Wiring and Powering On

1. Insert the SD card with the operating system flashed (using SD card boot as an example).

2. Connect the HDMI0 output port of the Raspberry Pi Compute Module 4 IO Board to an HDMI display using an HDMI cable.

3. Connect the USB mouse and keyboard to any USB 2.0 port on the Raspberry Pi Compute Module 4 IO Board.

4. Connect the Ethernet cable to the Ethernet port.

5. Plug the power adapter into the power interface of the Raspberry Pi Compute Module 4 IO Board. When the device is powered on, the green power indicator on the core board will light up.

tip

The system takes approximately 40 seconds to boot up after powering on. Once the system successfully starts, the green indicator light on the core board will change from a steady light to a blinking state.

LogIn to the System

After the system boots, the HDMI display shows the desktop.

Log in using the username radxa and the password radxa.