Datasheet

253
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
14.6.7 RTC Status Register
Name: RTC_SR
Address: 0x400E1A78
Access: Read-only
• ACKUPD: Acknowledge for Update
0: Time and calendar registers cannot be updated.
1: Time and calendar registers can be updated.
• ALARM: Alarm Flag
0: No alarm matching condition occurred.
1: An alarm matching condition has occurred.
• SEC: Second Event
0: No second event has occurred since the last clear.
1: At least one second event has occurred since the last clear.
• TIMEV: Time Event
0: No time event has occurred since the last clear.
1: 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: minute change, hour change, noon, midnight (day change).
• CALEV: Calendar Event
0: No calendar event has occurred since the last clear.
1: 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.
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
–––CALEVTIMEVSEC ALARM ACKUPD