>
> Padu,
>
> I don't know what kind of drive capability your input device(s) has
> (have), but I would put a pullup or pulldown, whichever is appropriate,
> on the PIC inputs to keep them in the opposite state until driven by the
> input device.
> Also, make sure you have bypass caps ( both high and low capacitance
> values like .1 uF in parallel with .001 uF) on all IC's from Vcc to
> Gnd., especially the PIC.  Maybe even use an optoisolator at the PIC
> input from the ring signal.
>
> Let us know what you do as a final fix.
>
> Regards,
>
>
> Jim
>


Jim,

Thanks for the suggestions, we thought that since the signal was coming from 
an IC, we wouldn't need pull downs... it turns out, as you suggested, we do. 
That seemed to do the trick. Thanks.

Now, regards the other part of my original post (PIC being in a state of 
quasi-powered by an input line in high while Vdd disconnected), we solved 
that changing the input pin from RC0 to RC5.... does that make any sense? We 
did that because RC5 is the only one that doesn't share functions 
(comparators for example) with other features. Do you think those additional 
components might be leaking throughout the PIC?

Cheers

Padu 

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