The CM4's 100-pin connectors have multiple functions per pin. The official schematic shows exactly how the Raspberry Pi Foundation routes each pin. Copying from the official source is far safer than relying on guesswork or incomplete third-party pinout tables.
The official schematic includes comprehensive guidelines: 3W spacing for differential pairs, reference plane continuity, back-drilled or blind/buried vias, and ESD protection devices covering all external connectors.
All these projects are typically licensed under permissive open-source licenses like CC BY 4.0 or similar. cm4 94v0 schematics free
CM4 94V0 schematics refer to the detailed diagrams and documentation that outline the internal architecture, components, and connections of the CM4 94V0 computer module. These schematics serve as a blueprint, providing essential information for:
The CM4 handles high-speed signals like USB, PCIe, and HDMI. Your PCB layout must ensure proper differential impedance (usually 90Ω or 100Ω). The CM4's 100-pin connectors have multiple functions per pin
When submitting your Gerber files for manufacturing, you can request that the fabricator silkscreen their unique UL file number and the 94V-0 logo onto the board. This is often mandatory if your final product undergoes commercial safety compliance testing (such as CE, FCC, or UL certification).
: The CM4IO project requires KiCad version 6.0 or later . Since KiCad 6.0 may not be the stable release on your system yet, you might need to install a nightly build. Nightly builds can have bugs, so proceed with caution. These schematics serve as a blueprint, providing essential
: Downloadable KiCad projects and PDF schematics for the reference carrier board.