Datasheet

17.8 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 require synchronization when read and/or written. Synchronization is denoted by the

"Read-Synchronized" and/or "Write-Synchronized" property in each individual register description.

Optional write-protection by the Peripheral Access Controller (PAC) is denoted by the "PAC Write-

Protection" property in each individual register description.

SAM D21 Family

SYSCTRL – System Controller

Datasheet Complete

DS40001882D-page 194