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How to detect if VBAT supply is present for RTC to work?

Question asked by Amit Kumar on Aug 20, 2014
Latest reply on Sep 9, 2014 by Amit Kumar

Hi

I am using K60 custom made board with cw10.6. In my application I have to time stamp the data. for that I am using RTC. If VBAT pin is given a supply of 3.6V through a coin cell and then the program is dumped, my code is works fine . Suppose my battery is dead, my programs hangs and keeps restarting. Is there any way to find out if VBAT supply is present?

During Initialization I want to check if VBAT supply is present only then I will initiate the RTC else I will use some other clk source i.e from different uc. I also wanted to know what will happen if  VBAT pin is left open? Will my entire program hang or will the rest of the program work excluding RTC?  I will be using PE component for RTC.

 

Kind Regards

Amit Kumar

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