INBOXTemporary workspace for new documentation and work in progress.Pages in this categoryVersioning Scheme (X.Y.Z)Project Status and PlanQuick ReferencePCBA v1 Debug ReportSTUSB4500 NVM Programming SetupPCBA v2 Debug Report — STUSB4500 CC1DB Failurev3 Test Point Planningv3 Bring-Up & Test Procedurev3 USB-PD Failure Diagnosis (pin 18 root cause)STUSB4500 Pin Cheat-Sheet (beginner)v4 USB-PD Failure Diagnosis (front-end datasheet review)Ranked root-cause candidates for the v4 (0.4.0) PD failure, verified against the real netlist and the ST datasheets, plus a bench discrimination procedure for the dead v4 boards.v4 As-Built Order Verification & Footprint Geometry AuditBoard B Architecture Review (DC-DC + LDO + Output)Board Split Decision — Fix List + A/B Interface ContractLocked decisions from the wave-2 decision pass (#90) - the front-end fix list for the existing KiCad project / Board A, the Board A to Board B interface contract with current-rating math, and the doc-structure assumption.Revision HistoryTakeshi TakatsudoCreated: 2026-06-14T17:22:26+09:00Updated: 2026-06-14T17:57:27+09:00