Try capacitively coupling the oscillator input and setting the PIC to XTAL 
osc instead of external. You will likely need a couple of resistors to 
DC-restore the signal after the capacitor.

Bob Ammerman
RAm Systems

----- Original Message ----- 
From: "Wouter van Ooijen" <wouter@voti.nl>
To: "'Microcontroller discussion list - Public.'" <piclist@mit.edu>
Sent: Sunday, April 09, 2006 3:11 PM
Subject: RE: [PIC] How to work around Phantom Power?


>> If the DC is applied then the clock input connected it works
>> the way the
>> code would suggest.  But if the clock is connected before the
>> DC power
>> is applied strange things happen (LEDs not in the states the
>> code would
>> suggest).
>
> If you can't prevent osc input before power is available I would put
> some load on the power line (470 Ohm would be fine - 10 mA) and add an
> external brown-out reset chip (TO92 style, microchip has them, plenty of
> others too).
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu
>
>
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