Datasheet

Chapter 1. Introduction
Figure 1. Render of the
Raspberry Pi Compute
Module 4 IO Board.
The Raspberry Pi Compute Module 4 IO Board (CM4IO) is designed to assist in the development of products that make
use of the Raspberry Pi Compute Module 4. The Raspberry Pi Compute Module 4 IO Board contains many of the
interfaces that the Raspberry Pi 4, Model B has, and for general usage you should refer to Raspberry Pi 4, Model B
documentation. The significant difference between CM4IO and Raspberry Pi 4, Model B is the addition of a single PCIe
socket. The CM4IO has been designed as both a reference design for CM4 or to be used directly as a product with the
possible addition of PCIe Cards and Raspberry Pi HATs.
Raspberry Pi Compute Module 4 IO Board
Chapter 1. Introduction 3