The vpp has to come on a fraction before vcc to get the device in
programming mode
see http://users.tpg.com.au/btkelly/jdm_b.htm

Peter

----- Original Message -----
From: "Sergio Masci" <smpl@NTLWORLD.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, June 23, 2004 8:01 PM
Subject: Re: [PIC]: Prog Spec - MCLR as input


> ----- Original Message -----
> From: Tony Nixon <Tony.Nixon@ENG.MONASH.EDU.AU>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Thursday, June 24, 2004 12:34 AM
> Subject: [PIC]: Prog Spec - MCLR as input
>
>
> > Hi all,
> >
> > I can't find anything on Microchips web site about this, but has anyone
> > seen any info on entering programming mode after the MCLR pin has been
> > configured as an input in the CONFIG statement.
> >
> > TIA
> >
> > regards
> >
> > Tony
> >
>
> Wouter mentions this on his wisp628 page. I seem to remember he has some
kind of
> dongle that clobbers the power in some way to overcome the problem.
>
> Regards
> Sergio Masci
>
> http://www.xcsb.com
>
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