PCF8563 alarm function

Projects Networking, Protocols, and Devices
1

I am trying to use an PCF8563 break-out board to generate an interrupt every 24 hours using the alarm function.
On an Arduino UNO and using the Rtc_Pcf8563 library this works fine.

However after each alarm :

  • the PCF8563 INT stays low and has to be reset with 'rtc.clearAlarm()'
  • the alarm function is disabled and has to be re-enabled with 'rtc.enableAlarm()'

I would like the RTC to independently generate an interrupt pulse every 24 hrs,
without having to service it with 'clearAlarm' and 'enableAlarm' via the I2C bus.

Is this possible with the PCF8563 ?

I know the timer function could do this, but the longest timer period is 255 min, which means that I would have to keep count of the interrupts and skip them untill they reach 24 hrs.

2

No it is not

3

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