Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 704

Interrupts
Writes posted together at the beginning of the same second take effect
together at the next 1 Hz tick. The following sequence is safe and does not
result in any spurious interrupts from a previous state.
1. Wait for 1 Hz tick.
2. Write new values for
3. Write 1s to clear the
watch, and/or per-interval.
4. Write new value for
and/or per-interval interrupts enabled.
5. Wait for 1 Hz tick.
6. New values have now taken effect simultaneously.
18-16
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,
RTC_CLOCK
flags for Alarm, Day Alarm, Stop-
RTC_CLOCK
with Alarm, Day Alarm, Stopwatch,
RTC_CTL
ADSP-214xx SHARC Processor Hardware Reference
, and/or
RTC_ALARM
.
RTC_SWCNT