Hi you guys,
                    I just thought to tell you what was the final outcome.
The power supply to the pic was 5.6 V which definitely was one of the
problems as dropping it to exactly 5 V was necessary to fix it. Then I found
that enabling the "failsafe clock monitor" stopped it, only if the supply
was not 5V6 though. Now if there was any distirbance the pic would change
speed  and blow all my nice shiney new IGBT's as it does not go back to the
xtal osc. I then found that using the "2 speed osc. startup" fixed the
problem with no ill effects.
    There does see to be a problem at startup with a 10Mhz xtal and the PLL
that the watchdog does not help. I know there are problems with this chip
and I will keep clear of it in future, but this might help someone else that
is trying to use it.

Regards,
        George
----- Original Message -----
From: "Ken Pergola" <no_spam@LOCALNET.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, September 01, 2003 12:26 AM
Subject: Re: [PIC:] 18f1220 xtal osc.


> Hi George,
>
> Sometimes an incubation period helps out a bit. You might see exactly
what's
> going on once you get some rest and get your mind off this problem. Keep
> workin' it though (divide and conquer) and please let everyone know how
> everything works out for you. I'm not much help since I'm not intimately
> familiar with the PIC18F1220, but I just downloaded the data sheet last
> night -- right now I'm in a PIC18F452 project.
>
> Best of luck tomorrow George,
>
> Ken Pergola
>
>
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of gtyler
> Sent: Sunday, August 31, 2003 5:12 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC:] 18f1220 xtal osc.
>
>
> I have been working late on this thing for too long now. It is now 23:01
on
> sunday night here, maybe it needs to sleep a bit, I'm making mistakes now.
> thanks for your help, I find this a really great way of working, with
mplab
> in one window and outlook in the other - sort of like a devlopment tool !
I
> can get a post, change the code, assemble it and program the chip all in
> less that a minute. Thanks Ken
>
> George
>
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