REQ-037 — GPIO Expander Presence
approved · Functional · Approved by demo
Statement
The PI4IOE5V6416 GPIO expander shall be found at its expected I2C address. GPIO outputs shall be usable for external module control signals. The INT output shall be connected to IO22 for MCU wake-from-sleep. Supply decoupling (100 nF) shall be fitted.
Acceptance Criteria
I2C scan returns expected address for PI4IOE5V6416; GPIO output toggling verified; INT line connected to IO22.
Linked Test Cases
| Code | Title | Status |
|---|---|---|
TC-D-01 |
I2C scan — external connector | pass |
Sign-offs
| Stage | Signed by | Role | When | Attestation |
|---|---|---|---|---|
| approved | demo | — | 2026-06-05 06:42 | — |