CM4 has only one USB 2.0 interface (unless you use PCIe to USB). Many schematics short both USB ports to the same D+/D- – this fails.
Elias had been a hobbyist until his brother, a lead engineer at Aetheris, vanished. The only thing left behind was a thumb drive labeled with a cryptic version number: CM4-Rev.X-94V0 .
To find the correct schematic, you must first understand what the labels on your board mean:
Click.
The CM4 94V0 schematics provide a detailed blueprint of the board's design, highlighting its various components and their interconnections. Here's a breakdown of the key components:
