16.12 Register Description

Registers can be 8, 16, or 32 bits wide. Atomic 8-, 16- and 32-bit accesses are supported. In addition, the 8-bit quarters and 16-bit halves of a 32-bit register, and the 8-bit halves of a 16-bit register can be accessed directly.

Some registers are optionally write-protected by the Peripheral Access Controller (PAC). Optional PAC write-protection is denoted by the "PAC Write-Protection" property in each individual register description. For details, refer to Register Access Protection.

On SAM L11 devices, the PAC Security Attribution (Secure or Non-Secure) for this peripheral can not be changed and is always Non-Secure:

Secure access and Non-Secure access are granted

Refer to Peripherals Security Attribution for more information.