I’ll build the smallest practical CM5 support schematic: first I’ll inspect the CM5 pinout and requirements, then add only the essential power/regulation, decoupling, and required biasing, wire it, and run checks.
Minimum architecture selected: regulated 5 V enters through USB-C, CM5 handles its onboard 3.3 V/1.8 V regulation, and GPIO_VREF will be tied to CM5_3.3V for normal 3.3 V GPIO. I’m adding only the USB-C input, VBUS protection, and two input capacitors.
Wiring is complete. The remaining ERC items are expected unused CM5 interfaces and unused USB-C data/SBU pins, so I’m marking them explicitly as no-connect rather than adding expansion circuitry.
Done — I added a minimal CM5 bring-up schematic: USB-C 5 V input, VBUS TVS protection, 100 µF + 100 nF input capacitance, CC1/CC2 to the CM5, all 5 V/GND pins wired, GPIO_VREF tied to CM5_3.3V, and unused interfaces explicitly marked no-connect.
I also created Minimal CM5 Bring-Up Notes with the BOM, power budget, datasheet assumptions, and validation notes. Remaining review items are layout-stage airwires because the board is not placed/routed yet; U1:VBUS_EN is intentionally unused for this minimal boot-only design.
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
General Purpose Thick Film Standard Power
and High-Power Chip Resistor
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
Features:
- RMCF – standard power ratings
- RMCP – high power ratings
- Nickel barrier terminations standard
- Power derating from 100% at 70ºC to zero at +155ºC
- RoHS compliant, REACH compliant, and halogen free
- AEC-Q200 compliant