If you are working on a custom hardware modification or repairing a specific fault, let me know:
The marking is not a specific model number, but an Underwriters Laboratories (UL) safety certification. It indicates:
A standard CM4 carrier schematic must include the following blocks (all compatible with 94V0-rated laminate like FR-4): cm4 94v0 schematics
: This is the "gold standard" for developers. It shows how to correctly wire the high-density Hirose connectors, power circuitry, and peripheral interfaces (PCIe, HDMI, USB). You can download the CM4 IO Board Schematic (PDF) from the official Raspberry Pi Documentation CM4 Datasheet
Need a specific schematic block (e.g., Ethernet, PCIe, or camera) for the CM4? Let me know, and I can provide more detailed circuit examples. If you are working on a custom hardware
HDMI and USB 2.0 signals should be routed as 100Ω differential pairs to maintain signal integrity.
Understanding CM4 94V-0 Schematics: A Complete Guide to Raspberry Pi Compute Module 4 Boards You can download the CM4 IO Board Schematic
The Raspberry Pi Compute Module 4 is a system-on-module (SOM) containing the BCM2711 processor, RAM, eMMC storage (optional), and power management circuitry. It connects to a carrier board via two 100-pin high-density connectors (DDR4 style).
If you use these apps and take notes on them, you need Video Notebook.
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