SULCK

Secure Region Unlock Bits

Important: This register is only available for SAM L11 and has no effect for SAM L10.
  0x20 16 PAC Write-Protection, Write-Secure x initially determined from NVM User Row after reset  
Parent topic: Register Description

Secure Region Unlock Bits

Bit  15 14 13 12 11 10 9 8  
  SLKEY[7:0]  
Access  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  
            DS AS BS  
Access            RW/R/RW RW/R/RW RW/R/RW  
Reset            x x x  

Bits 15:8 – SLKEY[7:0]: Secure Unlock Key

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 0 – BS: BOOT Secure Unlock Bit

BOOT Secure Unlock Bit

Default state after erase will be unlocked (0x1).

ValueDescription
0 The Secure Flash (BS region) is locked.
1 The Secure Flash (BS region) is not locked.

Bit 1 – AS: APPLICATION Secure Unlock Bit

APPLICATION Secure Unlock Bit

Default state after erase will be unlocked (0x1).

ValueDescription
0 The Secure Flash (AS region) is locked.
1 The Secure Flash (AS region) is not locked.

Bit 2 – DS: Data Flash Secure Unlock Bit

Data Flash Secure Unlock Bit

Default state after erase will be unlocked (0x1).

ValueDescription
0 The DS region is locked.
1 The DS region is not locked.