RTC_SS
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20.3.3.4.2.2 Alarm Interrupt RTCALARMINT (alarm_intr)
The alarm interrupt can be generated when the time set into TC ALARM registers is exactly the same as
in the TC registers. This interrupt is then generated if the IT_ALARM bit of the interrupts register is set.
This interrupt is low-level sensitive. RTC_STATUS_REG[6] indicates that IRQ_ALARM_CHIP has
occurred. This interrupt is disabled by writing ‘1’ into the RTC_STATUS_REG[6].
To set up an alarm:
• Modify the ALARM_SECONDS, ALARM_MINUTES, ALARM_HOURS, ALARM_DAY, ALARM_WEEK,
ALARM_MONTH, and ALARM_YEAR registers to the exact time you want an alarm to generate.
• Set the IT_ALARM bit in the RTC_INTERRUPTS register to enable the alarm interrupt.
3626
Timers SPRUH73H–October 2011–Revised April 2013
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