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???
12/09/02 15:45
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 		 #34069 - RE: PCA interrupt could it be
P3 = 0xFF; // P3 as outputs
first the comment should be P3 as inputs
second, the PCA need P1, not P3.

Also do a global search on P1 use, I, once, found that a port pin was accidentially cleared, (a write somewhere in the program wrote the whole port and did not (re)set the input pin. If that is the case your scope should show you.

Erik

List of 24 messages in thread
TopicAuthorDate
PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn't work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt more            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt more            01/01/70 00:00      
RE: PCA interrupt more            01/01/70 00:00      
RE: PCA interrupt more            01/01/70 00:00      
RE: PCA interrupt more            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      
RE: PCA interrupt could it be            01/01/70 00:00      
RE: PCA interrupt more            01/01/70 00:00      
RE: PCA interrupt doesn\\\\\\\'t work !            01/01/70 00:00      

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