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RTC of LPC1768 sometime works sometime not.

Question asked by Santosh Katke on Jul 26, 2017
Latest reply on Aug 1, 2017 by Kerry Zhou

Greetings,

 

I am using LPC1768 in my project. Everything goes fine except internal RTC. I have kept 1sec RTC interrupt upon which i am displaying date and time on GLCD but RTC interrupt stops after some time and then again after some time it starts where last time stopped. I found that 32KHz crystal stops oscillating after some time,when i checked wave forms on scope. I have checked for any dry solder and values of capacitors which are ok, replaced 32KHz crystal as well. So what could be the reason of this behaviour.

 

Thanks in advance.

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