30.8.11 Non-Secure Region Unlock Bits
Important: For SAM
L11 Non-Secure accesses, write
accesses (W*) are allowed only if Non-Secure Write is set in the NONSEC register.
| Name: | NSULCK |
| Offset: | 0x22 |
| Reset: | x initially determined from NVM User Row after reset |
| Property: | PAC Write-Protection, Write-Mix-Secure |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| NSLKEY[7:0] | |||||||||
| Access | W/W*/W | W/W*/W | W/W*/W | W/W*/W | W/W*/W | W/W*/W | W/W*/W | W/W*/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| DNS | ANS | BNS | |||||||
| Access | RW/RW*/RW | RW/RW*/RW | RW/RW*/RW | ||||||
| Reset | x | x | x |
Bits 15:8 – NSLKEY[7:0] Non-Secure Unlock Key
When this bit group is written to the key value 0xA5, the write will be performed. If a value different from the key value is tried, the write will be discarded and INTFLAG.KEYE set.
Bit 2 – DNS Data Flash Non-Secure Unlock Bit
Note: For SAM
L10 devices, the Non-Secure Data Flash
region corresponds to the entire Data Flash region.
| Value | Description |
|---|---|
| 0 | The Non-Secure Data Flash region is locked. |
| 1 | The Non-Secure Data Flash region is not locked. |
Bit 1 – ANS APPLICATION Non-Secure Unlock Bit
Note: For SAM
L10 devices, the Non-Secure Flash
(APPLICATION region) corresponds to the entire Flash (APPLICATION region).
| Value | Description |
|---|---|
| 0 | The Non-Secure Flash (APPLICATION region) is locked. |
| 1 | The Non-Secure Flash (APPLICATION region) is not locked. |
Bit 0 – BNS BOOT Non-Secure Unlock Bit
Note: For SAM
L10 devices, the Non-Secure Flash
(BOOT region) corresponds to the entire Flash (BOOT region).
| Value | Description |
|---|---|
| 0 | The Non-Secure Flash (BOOT region) is locked. |
| 1 | The Non-Secure Flash (BOOT region) is not locked. |