General product
CM4 socket: suitable for all variants of Compute Module 4
Standard Raspberry Pi HAT connectors with PoE support
Standard PCIe Gen 2 x1 socket
Real-time clock (RTC) with battery backup
Dual HDMI connectors
Dual MIPI camera connectors
Dual MIPI display connectors
Gigabit Ethernet socket supporting PoE HAT
On-board USB 2.0 hub with 2 USB 2.0 connectors
SD card socket for Compute Module 4 variants without eMMC
Support for programming eMMC variants of Compute Module 4
PWM fan controller with tachometer feedback
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-the-shelf 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
