Datasheet

30.8 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 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 30.5.8 Register Access Protection

Some registers are synchronized when read and/or written. Synchronization is denoted by the "Write-

Synchronized" or the "Read-Synchronized" property in each individual register description. For details,

refer to 30.6.6 Synchronization.

Some registers are enable-protected, meaning they can only be written when the peripheral is disabled.

Enable-protection is denoted by the "Enable-Protected" property in each individual register description.

SAM D21 Family

TC – Timer/Counter

Datasheet Complete

DS40001882D-page 680