Oooh -- definiteley not good.


----- Original Message -----
From: "Douglas Butler" <dbutler@IMETRIX.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, April 03, 2002 11:53 AM
Subject: Re: [PIC]: Input signal w/o power...


> I don't know about analog inputs, but on a digital input the input
> signal will turn on the input protection diode and try to power the VCC
> line, possibly causing the PIC to start running!  It all depends on how
> much power is available on that 5V input and what is on the PIC VCC
> line.
>
> Sherpa Doug
>
> > -----Original Message-----
> > From: Pic Dude [mailto:picdude@AVN-TECH.COM]
> > Sent: Wednesday, April 03, 2002 1:01 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [PIC]: Input signal w/o power...
> >
> >
> > Can I safely send a signal (up to appox 5V) to an analog port
> > on a 16F872 or 16F877 when there is no power applied to the
> > chip?  Or will this damage the chip?  How about on a digital
> > input pin?
> >
> > Thanks,
> > -Neil.
> >
> > --
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> >
>
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>

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