CM4 to CM3 Adapter

This adapter board converts a Raspberry Pi Compute Module 4 (CM4) to the Raspberry Pi Compute Module 3 SODIMM format, allowing you to maintain projects, designs and products that use the older CM3 format by utilising newer generation Compute Modules.

The adapter board uses a standard CM4 connector and includes an onboard CM4 ACT status indicator, buck-boost chip to support 3.3V/V power input, power supply selection pads and IO level selection pads.

Adapt them all!

We have a few other options in the store if you're into this CM4 adapting life:

• CM4 to 3B adapter
• CM4 to 4B adapter

Features

• Onboard standard CM4 connector, support access to CM4 Lite / eMMc series boards
• Onboard standard CM3 SODIMM, easily connected to the original CM3 ecosystem baseboard
• Onboard buck-boost DC chip - supports 3.3V/5V power input
• Onboard ACT LED, can monitor the working status of CM4 in real-time
• Overall dimensions: 67.6mm x 46mm

Package Contents

• 1x CM4-to-CM3 Board

Compute Module not included

Resources

• Product Documentation

Onboard Resource Comparison

CM4-to-CM3-Board	CM4
HDMI	HDMI0
GPIO0~27	GPIO0~27
GPIO28, GPIO29	GPIO44(SDA0), GPIO45 (SCL0)
GPIO31, GPIO33	CAM_GPIO
GPIO30, GPIO32, GPIO33~45	NC
CSI0	CSI1
CSI1	CSI0
DSI0	DSI1
DSI1	DSI0
USB2.0	USB2.0
SDIO	SDIO