Raspberry Pi CM4-IO-BASE-B User Guide

Overview

This is an IO board for evaluating the Raspberry Pi CM4 or being integrated into end products. the board feature PoE function, it can be used for all variants of CM4.

Precautions for use

1: FAN fans only support 5V fans. 12V is not supported. Confirm the fan voltage before connecting.
2: The DSI display interface is the DSI0 interface, and the DSI1 display interface is not connected.
3: Type C interface can be used for power supply or USB SLAVE interface for burning image.
4: In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to burn the image.
5: When CM4 is in normal use, it needs to provide 5V 2A power supply for CM4. Otherwise, problems such as automatic shutdown, frequency reduction, etc. may occur.
6: When using the M.2 interface, please use the matching screws. Using screws of other lengths may cause the CM4 core to be damaged by the screws.
7: The module does not have any protection, please do not short-circuit the power supply.

Dimension

CM4-IO-BASE-B

Compute_Module 4 Core board

What's on board

No.	Component	Description
1	CM4 connector	Suitable for all variants of Compute Module 4
2	DC power supply/programming interface	5V/2.5A power supply, also can be used as eMMC programming interface
3	DISP Interface	MIPI DSI Display interface
4	FAN Interface	Convenient access to the cooling fan, support speed regulation and speed measurement
5	CAM Interface	Dual MIPI CSI camera interface
6	HDMI0 Interface	HDMI Interface，Support 4K 30fps output
7	USB 2.0 Interface	2-channel USB 2.0 Interface, support various USB device insertion
8	Gigabit Ethernet	RJ45 Gigabit Ethernet port, support 10/100 / 1000M network access
9	M.2 indicators	Indicates the working status of the interface
10	ACT indicators	Raspberry Pi operating statusindicator
11	PWR indicators	Raspberry Pi power indicator
12	BOOT	Jumper cap connection：CM4 USB Type C Boot Jumper cap is not connected： eMMC and SD card Boot
13	40PIN GPIO Interface	Conveniently connect various HAT modules
14	Micro SD Card interface	Used to connect to the Micro SD card with system, only for Lite version
15	HDMI1 interface	HDMI1 Interface，Support 4K 30fps output
16	USB 2.0 interface	USB 2.0 Cable interface, connected through the adapter board
17	FE1.1S	USB HUB chip, USB Interface 1 expand 4
18	M.2 Interface	Suitable for NVIE solid state drives, or communication modules that support PCIE M.2 interface
19	RTC	Support RTC wake up, shutdown, restart, or other functions
20	RTC interrupt pin switch	PI-RUN: RTC trigger interrupt CM4 restart GN-EN: RTC trigger interrupt CM4 shutdown D4: RTC trigger interrupt D4 pin trigger
21	EMC2301	Fan controller, control fan speed, measure fan speed
22	RTC Battery connector	Can be connected to CR1220 button battery

Document

3D Drawing

3D Drawing

Demo codes

Dt files

Software

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