CM4 to 4B Adapter

If you're lucky enough to have a Compute Module 4 lying around and you would prefer the Raspberry Pi 4 format - this board is for you!

This adapter board accepts your Raspberry Pi Compute Module 4 and converts it to the Raspberry Pi 4 format (along with a few perks) - 2x MicroHDMI, 1x USB-C, 4x USB 3.0, full 40-pin colour-coded GPIO header, Gigabit Ethernet, PoE header, CSI/DSI ports, Micro-SD slot, fan header and a boot selection switch.

We're really digging the 4x USB 3.0 ports and the option to use a CM4 with onboard storage to avoid the use of a MicroSD card - and that 5V fan header will be dead handy too.

A product wiki is on hand to help with a few setup considerations, but other than that it's good to go.

CM4 is not included.

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 CM3 adapter

Features

• Onboard standard CM4 connector, support access to CM4 Lite / eMMc series
• Easily compatible with the interfaces of Raspberry Pi 4 B board
• 4x USB 3.0 ports, compatible with USB 2.0 / 1.1 transmission
• RJ45 Gigabit Ethernet port, 10 / 100 / 1000 M adaptive
• PoE header, for connecting PoE HATs
• Colour-coded GPIO header
• Boot selection switch
• 2x micro-HDMI
• USB-C for power supply (can be used as the USB SLAVE interface for programming images)
• CSI port for Raspberry Pi Camera Module
• DSI port for Raspberry Pi Touch Display 2
• Fan header
• MicroSD slot

Onboard Features

No.	Name	Description
1	CM4 socket	For all variants of Compute Module 4
2	40-pin GPIO header	For connecting to all HATs
3	PoE	Support access to PoE HAT
4	Gigabit Ethernet port	Supports 10 / 100 / 1000M network
5,6	USB3.0 interface	4x USB3.0 interface, support USB devices
7	FAN header	For 5V fan. Does not support speed regulation
8	HDMI interface	2 x Micro HDMI interface, supports 4K 30fps output
9	USB Type C	5V/2.5A power supply Can also be used for eMMC programming
10	LED indicator	Indicating the working status of the Raspberry Pi
11	BOOT	ONCM4 USB Type C booting guide
		OFF： eMMC or SD card boot guide
12	CAM interface	MIPI CSI interface
13	Micro SD card slot	Only for the Lite CM4 usage
14	DISP1 interface	MIPI DSI interface, DISP1 interface
15	IO-VREF selection	CM4 IO logic voltage switch 3.3V or 1.8V
16	Function pin	RUN: CM4 running status pin
		GL-EN: Power supply enable pin
17	System function switch	BT_DIS: Bluetooth disabled,  for CM4 with antenna
		WiFi_DIS: WiFi disabled,  for CM4 with antenna
		WP_DIS: EEPROM write protection

Resources

• Product wiki

Package Contents

• 1x CM4 to Pi4 Adapter
• 1x Screws pack (attached to the board)

CM4 is not included