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how to store rtc time in lpc 2148 if power down?

Question asked by Atul Bhardwaj on Nov 7, 2016
Latest reply on Nov 29, 2016 by CarlosCasillas

I am using lpc 2148 arm7 board from nxp. I have used your example for rtc clock. It is working well but when I switches off the power of the board and again switches on the board the current time is not shown. it is not storing. as there is 3.2 volt on 49 pin of ic. why?