Raspberry Pi Compute Module 4 IO Board, A Development Platform And Reference Base-Board Design For CM4

Compute Module 4 IO Board

The Compute Module 4 IO Board is a companion board for Raspberry Pi Compute Module 4 (supplied separately). It is designed for use both as a development system for Compute Module 4 and as an embedded board integrated into end products.

The IO board is designed to allow you to create systems quickly using off-theshelf parts such as HATs and PCIe cards, which might include NVMe, SATA, networking, or USB. The major user connectors are located along one side to make enclosures simple.

Compute Module 4 IO Board also provides an excellent way to prototype systems using the Compute Module 4.

Interfaces Introduction

Specifications

CM4 SOCKET	suitable for all variants of Compute Module 4
CONNECTORS	Standard Raspberry Pi HAT connectors with PoE support Standard PCIe Gen 2 x1 socket Various jumpers to disable specific features, e.g. wireless connectivity, EEPROM writing
RTC	Real-time clock with battery socket and ability to wake Compute Module 4
VIDEO	2 x MIPI DSI display FPC connectors (22-pin 0.5 mm pitch cable)
CAMERA	2 x MIPI CSI-2 camera FPC connectors (22-pin 0.5 mm pitch cable)
USB	2 x USB 2.0 connectors Micro USB socket for updating Compute Module 4
ETHERNET	Gigabit Ethernet RJ45 with PoE support
STORAGE SOCKET	MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
FAN	Standard fan connector
POWER INPUT	12V / 5V
DIMENSIONS	160 × 90mm

CM4 Base Board Selection Guide

CM4 BASE BOARD	INTERFACE COUNT AND SPECIFICATIONS
	POE	GIGABIT ETH	40PIN GPIO	PCIE	USB①	DSI	HDMI	CSI	RTC	FAN HEADER	POWER INPUT	FEATURES
MINI BASE A		×1	√	M.2 M	2.0×4	×1	×2	×2		5V	5V	mini size
MINI BASE B		×1	√	M.2 M	2.0×4	×1	×2	×2	√	5V	5V	mini size
DUAL GIGABIT ETH		×2	√		3.0×3	×1	×2	×2	√	5/12V	7-36V
IOT BASE	√	×1		Gen2×1	2.0×2	×2	×2	×2	√	5/12V	7-36V	5G/4G support RS232 RS485 ADC
POE BASE (B)	√	×1	√	Gen2×1	2.0×4	×2	×2	×2	√	5/12V	5V	RS232 RS485
POE BASE	√	×1	√		3.0×4	×2	×2	×2	√	5/12V	7-36V
RASPBERRY PI OFFICIAL	②	×1	√	Gen2×1	2.0×4	×2	×2	×2	√	12V	12V
NOTE	① USB 3.0 is equivalent to USB 3.2 Gen1 ② There's PoE header only on the Raspberry Pi official IO board without PoE circuit, that means additional PoE module is required for the official IO board to enable PoE feature. Unless otherwise specified, the PoE feature here stands for integrating 802.3af-compliant PoE circuit (5V/2.5A).

Weight: 0.107 kg

1. Compute Module 4 IO Board x1