No Power Net Portals were added because the schematic currently has no connected supply rails; VBUS, VCC, VCCIO, AVCC, and 3V3OUT are floating. Adding portals now would hide missing power wiring rather than fix it.
- Open: ERC reports 78 errors, including three missing-power errors.
- Next: Connect the intended USB/power-source topology first, then add portals to the resulting driven rails.