Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 275

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Name: RTC_SR

0x400E1478

Access: Read-only 

0 (FREERUN) = Time and calendar registers cannot be updated.

1 (UPDATE) = Time and calendar registers can be updated.

0 (NO_ALARMEVENT) = No alarm matching condition occurred.

1 (ALARMEVENT) = An alarm matching condition has occurred.

0 (NO_SECEVENT) = No second event has occurred since the last clear.

1 (SECEVENT) = At least one second event has occurred since the last clear.

0 (NO_TIMEVENT) = No time event has occurred since the last clear.

1 (TIMEVENT) = At least one time event has occurred since the last clear.

The time event is selected in the TIMEVSEL field in RTC_CR (Control Register) and can be any one of the following events: min-
ute change, hour change, noon, midnight (day change).

0 (NO_CALEVENT) = No calendar event has occurred since the last clear.

1 (CALEVENT) = At least one calendar event has occurred since the last clear.

The calendar event is selected in the CALEVSEL field in RTC_CR and can be any one of the following events: week change, 
month change and year change.

0 (CORRECT) = The internal free running counters are carrying valid values since the last read of RTC_SR.

1 (ERR_TIMEDATE) = The internal free running counters have been corrupted (invalid date or time, non-BCD values) since the 
last read and/or they are still invalid.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

–

–

–

–

–

–

–

–

7

6

5

4

3

2

1

0

–

–

TDERR

CALEV

TIMEV

SEC

ALARM

ACKUPD