if there is nothing connected and the pin is set as input, then its gonna
float. Then its a free-for-all as to what will happen. use pull-ups or
pull-downs.

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jinx
> Sent: 05 June 2002 01:17 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: RB0/INT Madness
>
>
> > I've got a 16F84A PIC circuit with nothing connected
> > to PORTB at the moment.
>
> "nothing" - does this include a pull-down ? Maybe you have
> the pull-ups turned on. It's possible that B0 is never changing
> state, therefore.........
>
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