33.7 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.

Optional write-protection by the Peripheral Access Controller (PAC) is denoted by the "PAC Write-Protection" property in each individual register description.

Refer to Register Access Protection and PAC - Peripheral Access Controller.

On SAM L11 devices, the Mix-Secure peripheral has different types of registers (Non-Secure, Secure, Write-Secure, Mix-Secure, and Write-Mix-Secure) with different access permissions for each bitfield. Refer to Mix-Secure Peripherals for more details. In the following register descriptions, the access permissions are specified as shown in the following figure.