Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

302

  

RTC_CR

0x400E1460

  

Read/Write

This register can only be written if the WPEN bit is cleared in the System Controller Write Protection Mode Register 

(SYSC_WPMR).

0: No effect.
1: Stops the RTC time counting.
Time counting consists of second, minute and hour counters. Time counters can be programmed once this bit is set and 

acknowledged by the bit ACKUPD of the RTC_SR.

0: No effect.
1: Stops the RTC calendar counting.
Calendar counting consists of day, date, month, year and century counters. Calendar counters can be programmed once 

this bit is set and acknowledged by the bit ACKUPD of the RTC_SR.

The event that generates the flag TIMEV in RTC_SR depends on the value of TIMEVSEL.

The event that generates the flag CALEV in RTC_SR depends on the value of CALEVSEL

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

CALEVSEL

15

14

13

12

11

10

9

8

–

–

–

–

–

–

TIMEVSEL

7

6

5

4

3

2

1

0

–

–

–

–

–

–

UPDCAL

UPDTIM

0

MINUTE

Minute change

1

HOUR

Hour change

2

MIDNIGHT

Every day at midnight

3

NOON

Every day at noon

0

WEEK

Week change (every Monday at time 00:00:00)

1

MONTH

Month change (every 01 of each month at time 00:00:00)

2

YEAR

Year change (every January 1 at time 00:00:00)