Datasheet

347
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
16.6.7 RTC Status Register
Name: RTC_SR
Address: 0x400E1878
Access: Read-only
 ACKUPD: Acknowledge for Update
 ALARM: Alarm Flag
 SEC: Second Event
 TIMEV: Time Event
Note: The time event is selected in the TIMEVSEL field in the Control Register (RTC_CR) and can be any one of the following events:
minute change, hour change, noon, midnight (day change).
 CALEV: Calendar Event
Note: The calendar event is selected in the CALEVSEL field in the Control Register (RTC_CR) and can be any one of the following
events: week change, month change and year change.
31 302928 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
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76543 210
– – TDERR CALEV TIMEV SEC ALARM ACKUPD
Value Name Description
0 FREERUN Time and calendar registers cannot be updated.
1 UPDATE Time and calendar registers can be updated.
Value Name Description
0 NO_ALARMEVENT No alarm matching condition occurred.
1 ALARMEVENT An alarm matching condition has occurred.
Value Name Description
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.
Value Name Description
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.
Value Name Description
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.