Template: CM4-to-Pi4-Adapter Spec
From Waveshare Wiki
Overview
Introduction
This is a CM4 To Pi 4B Adapter for Raspberry Pi and is an alternative solution for Raspberry Pi 4B. Onboard 4 x USB3.0 ports, Gigabit Ethernet port, PoE header, and so on.
Features
- Onboard standard CM4 connector, support access to CM4 Lite / eMMc series boards with Quad Core Cortex A72 64-bit processor, more powerful performance
- Easily compatible with the interfaces of Raspberry Pi 4B board
- Onboard 4-ch USB 3.0 ports, compatible with USB 2.0 / 1.1 transmission
- Onboard RJ45 Gigabit Ethernet port, 10 / 100 / 1000 M adaptive
- Onboard PoE header, for connecting PoE HATs
- DSI interface is DSI1
- USB Type C interface is for the power supply or can be used as the USB SLAVE interface for programming images
- Do not connect to other devices when using the micro USB port to program the image for ensuring the power supply of CM4
- CM4 must be provided by 5V 2A, or it will shut down, lower frequency, etc.
Dimensions
CM4-IO-BASE-B
Compute_Module 4
Onboard Resources
| No. | Name | Description | |
| 1 | CM4 socket | for all variants of Compute Module 4 | |
| 2 | 40PIN GPIO header | for connecting to all HATs | |
| 3 | PoE | Support access to PoE HAT | |
| 4 | Gigabit Ethernet port | RJ45 Gigabit Ethernet port, support 10 / 100 / 1000M network access | |
| 5,6 | USB3.0 interface | 4x USB3.0 interface, support USB devices | |
| 7 | FAN header | Connect to the cooling fan, does not support speed regulation and speed measurement only supports 5V fan (not soldering by default) | |
| 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 as an eMMC programming interface | |
| 10 | LED indicator | Indicating the working status of the Raspberry Pi | |
| 11 | BOOT | ON：CM4 USB Type C booting guide OFF： eMMC or SD card boot guide | |
| 12 | CAM interface | MIPI DSI display interface, DISP1 interface | |
| 13 | Micro SD card slot | For connecting to a Micro SD card with the system, only for the Lite version | |
| 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, only for CM4 with antenna WiFi_DIS: WiFi disabled, only for CM4 with antenna WP_DIS: EEPROM write protection |