Datasheet

Figure 27-3. Gregorian and Persian Modes Update Sequence
Prepare Time or Calendar Fields
Set UPDTIM and/or UPDCAL
bit(s) in RTC_CR
Read RTC_SR
ACKUPD
= 1?
Clear ACKUPD bit in RTC_SCCR
Update Time and/or Calendar values in
RTC_TIMR/RTC_CALR
Clear UPDTIM and/or UPDCAL bit
in RTC_CR
No
Yes
Begin
End
Polling or
IRQ (if enabled)
Wait for second periodic event
SAM E70/S70/V70/V71 Family
Real-time Clock (RTC)
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echnology Inc.
Datasheet
DS60001527D-page 207