REQ-020 — External Serial Bus Connector (J3)
approved · Interface · Approved by demo
Statement
The external serial bus connector (J3) shall expose I2C, UART, SPI, 3.3V, VREF (2.5V), 5V, and GND. All bus signals and power rails shall be accessible for connecting external modules or test equipment.
Acceptance Criteria
I2C, UART, and SPI signals verified on J3; 3.3V measures 3.30V ± 3%; VREF measures 2.50V ± 0.1%; 5V measures 5.0V ± 5% on J3.
Linked Test Cases
| Code | Title | Status |
|---|---|---|
TC-D-01 |
I2C scan — external connector | pass |
TC-C-02 |
Serial bus connector (J3) power rail presence | open |
Sign-offs
| Stage | Signed by | Role | When | Attestation |
|---|---|---|---|---|
| approved | demo | — | 2026-06-05 13:14 | — |
| approved | demo | — | 2026-06-05 06:42 | — |