Problem solved! It was the comparators. Thanks a lot for your help, you
saved me a lot of time.

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Dave Dilatush
Sent: Friday, July 26, 2002 6:38 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: TTL buffers


Richard Mellina wrote...

>Thanks for the quick reply.
>The 16F628 does not have any A/D converters.

No, but it has comparators on port A, and they remain enabled out
of reset until you turn them off by initializing the CMCON
register.

DD

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