Datasheet

...........continued

Offset Name Bit

Pos.

0x14

...

0x17

Reserved

0x18

ALARM0

7:0 MINUTE[1:0] SECOND[5:0]

0x19 15:8 HOUR[3:0] MINUTE[5:2]

0x1A 23:16 MONTH[1:0] DAY[4:0] HOUR[4]

0x1B 31:24 YEAR[5:0] MONTH[3:2]

0x1C MASK 7:0 SEL[2:0]

19.8 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.

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

Protection" property in each individual register description.

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.

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

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

SAM D21 Family

RTC – Real-Time Counter

Datasheet Complete

DS40001882D-page 267