Should have a closer look to your scheme ...
A good question would be How much are Va and Vb ...
probably more than the VDD supply of the pic ...
gave you some idea for debugging your Pic batt charger ???
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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