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Battery voltage monitoring with ACMP

Question asked by Martin Paré on Feb 10, 2017
Latest reply on Feb 13, 2017 by Nathan Smith

Hi all,

I am new to NXP and there is something I want to do and I don't understand how to do it.

I have a product running on a 3 volts battery.  There is a voltage divider on the battery that connects to pin PIO_0/ACMP_I1.  I need to monitor this voltage, and when it goes under a certain threshold, set a flag to indicate it is time to change the battery. I went through the datasheet and I don't understand what I should do.  Can someone please give me a quick overview of what I should do?

 

Thank you!

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