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How to invert pa4 interrupt


I am using Port PA pin pa4 for interrupt and it gives me an interrupt when it
is HIGH level. How can I change p4 input to give me an interrupt when LOW modifiying
any register? Could it be register CONFIG_PA_CHANGEABLE_BITS?

Thanks in advance.
Ion Cadierno
Mondragon Unibertsitatea
Txat euskalduna >>> http://www.euskalerria.org/solasgunea