Hi List ..

I have implemented a 4 x 4 keypad scan routine which works well. Using
RA0-RA3
as the row and RB4-7 as the column inputs.

I am using a 16f628 at 20mhz and the scan routine works out at a little over
11.7khz.

However - now for my question .... when I put a scope on RA0-2 I get the
11.7Khz, when
I put the scope on RA3 I get the 11.7khz but inverted ! Why ??

I have the comparators turned off ( CMCON = 7 ) - should I be doing anything
else.

Thanks


Steve




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