For the nRF51 Series, the command returns one of the following protection statuses:
| Status | Description |
|---|---|
| All | Protect all (PALL) is enabled, which protects code region 0, code region 1, RAM, and most peripherals from readback. |
| Region0 | Only code region 0 (CR0) is protected. |
| None | No memory regions are protected. |