If you want, I can:
The CM4 itself is a system-on-module that plugs into a baseboard. Raspberry Pi does not release the full, multi-layer schematics for the CM4 module itself to protect their intellectual property. However, they provide comprehensive implementation data:
To flash the eMMC on a custom board, you must implement the nRPI_BOOT jumper, allowing the module to be recognized as a USB device. cm4 94v0 schematics
If you are using the official Raspberry Pi Compute Module 4 IO Board (the large baseboard with PCIe, HDMI, and USB slots), the schematics are fully open-source.
A standard CM4 carrier schematic must include the following blocks (all compatible with 94V0-rated laminate like FR-4): If you want, I can: The CM4 itself
Almost every commercially viable FR4 PCB manufactured today bears a "94V-0" mark along with the logo of the specific PCB fabricator.
Finally, he plugged the board into the test rig. He held his breath, his finger hovering over the power switch. If you are using the official Raspberry Pi
If you are currently debugging a hardware issue or designing a custom layout, let me know: What or errors is your CM4 displaying?