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LPC15xx RTC not counting correctly

Question asked by ronalddaris on Dec 21, 2016
Latest reply on Jan 13, 2017 by Carlos_Mendoza

Inside our application but also with the LPCXpresso1549 evaluation board (OM13056) we see the RTC clock is sometimes incremented by 2 seconds.

This happens about 30 times a day so the RTC is getting very inaccurate.

 

We couldn't pinpoint the reason why our application was not working as expected so we made a small program that only reads the RTC counter and compares it with the previous value and there we see the counter sometimes is incorrectly incremented. 

 

Is there some kind of way to prevent this is happening?

 

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