RS5C372A Datasheet, PDF (57/59 Pages) RICOH electronics devices division – I2C bus SERIAL INTERFACE REAL-TIME CLOCK ICs

7.5-2 Alarm Interrupt Operation
AALE or BALE=0
*¹
Set alarm
(hour or minute, day-of-the-week)
Interrupt output select
Set bits
AALE or BALE=1
*²
RS5C372A/B
*1) Before setting alarm time, disable alarm function tentatively by
setting AALE or BALE to 0 in case the set time agrees with
the current time.
*2) After all alarm settings have been completed, enable alarm
function.
*^{3) Tentatively unlock alarm.}
Write (00×××101) when Alarm_A is used.
Write (00×××110) when Alarm_B is used.
Interrupt to CPU
No
AAFG(BAFG)=1?
YES
Alarm interrupt operation
Control register 2←(00××××101)
*³
Other
interrupt
operation
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