Rev B1 ECN-01 — Tag GPIO remap (draft)¶
Draft — 230220 only
Tag 230220 joins the shared nRF54L15 B1 pin remap. Current revision is A2. No Station enclosure changes on Tag.
Full family pin map: Rev B1 ECN-01 — GPIO remap. Other Tag B1 changes: Rev B1 ECN-04 — PAN611 keep-out, Rev B1 ECN-07 — LIS2DW12, Rev B1 ECN-09 — PAN611 stepped footprint.
Why B1¶
A2 violates three nRF54L15 silicon rules (see Firmware Compatibility):
- Accelerometer SPI split across P0 and P1 — no SPIM can bind it
- UART0 split across P0 and P2 — no UARTE can bind it
- Button and accelerometer INTs on P2 — no GPIOTE on P2 (no interrupt / wake)
What moves on 230220¶
| Function | A2 | B1 |
|---|---|---|
| ACC SPI (SCK, MISO, MOSI, CS) | P0 + P1 | All P1 → SPIM22 |
| ACC INT1 / INT2 | P2.08 / P2.09 | P1.11 / P1.13 |
| Service button | P2.06 | P0.04 |
| UART0 RX | P2.07 | P0.03 (with TX on P0.02) |
Six pins relocated. Schematic field: 230220A2 → 230220B1.
230220 remains the pin-out reference for the whole nRF54 family — Station boards follow the same physical pin directions.
Release¶
Tag B1 ships together with Station B1 (pcb-230220-B1). Station-only mechanical changes (screw mount, daughter-board slots) do not apply to Tag — see Rev B1 ECN-02 — Enclosure mounting.