Boardview — Cm-4 94v-0

The CM-4 is the heart of the matter. Released by Raspberry Pi, the Compute Module 4 is a DDR4-SODIMM-mechanical-compatible board containing the BCM2711 processor, RAM, eMMC storage, and power management ICs. Unlike a standard Raspberry Pi 4B, the CM-4 has no built-in USB, Ethernet, or HDMI ports. Instead, it relies entirely on a carrier board (often rated 94V-0) to expose these interfaces.

| Symptom | Boardview Use Case | |---------|--------------------| | No HDMI output | Trace HPD (Hot Plug Detect) and CEC lines from CM-4 connector to HDMI port | | USB ports dead | Locate USB_VBUS enable FET and check its gate drive from VL805 | | Ethernet not recognized | Follow ETH_CLK125 and ETH_INT to the PHY chip | | Overheating power supply | Find all capacitors on the 5V or 3.3V rail using the Boardview’s net highlight | cm-4 94v-0 boardview

A good Boardview includes a Bill of Materials (BOM) embedded. Click a passive component (e.g., C112) to see its value: 10µF/16V/X7R. If it’s missing or shorted, you know exactly what to order. The CM-4 is the heart of the matter

In a typical CM-4 carrier Boardview, the 100-pin connector is labeled J1 or DDR4_SODIMM. The pin numbering follows standard memory slots: A good Boardview includes a Bill of Materials

Critical Power Pins on the Connector: