> > But it's about the "PIC18F8720/8620/6720/6620"
> > according to the errata sheet.
>
> Oh, I didn't notice that either.  I just saw 18Fxx20 and assumed it
> included the 18F1320.
>
> > So I'm safe...
>
> No, you're not.  I discovered a bug that matches this description on an
> 18F1320 and it was confirmed by Microchip....
> ...I'm staying away from 18F1320/1220 above 4MHz until this issue
> is properly clarified by Microchip.

>From: Olin Lathrop <EraseMEolin_piclistEMBEDINC.COM>
>Reply-To: pic microcontroller discussion list <RemoveMEPICLISTEraseMEEraseMEMITVMA.MIT.EDU>
>To: RemoveMEPICLISTspam_OUTKILLspamMITVMA.MIT.EDU
>Subject: Re: [PIC]: You gotta be kidding me (PIC18FXX20 Rev A3)
>Date: Sun, 3 Aug 2003 10:16:16 -0400
>
> > Microchip has released a new Errata sheet for the PIC18FXX20 Rev. A3
> > Silicon/Data Sheet Errata family of devices.  If you are currently using
> > one of these devices please read the document located at
> > www.microchip.com/download/lit/suppdoc/errata/80129F.pdf.
> >
> > 4MHz of less operating speed is ok
> >
> > Anything over 4 can break.
> >
> > Yech.
> >
> > What a bogus thing.
>
>At least they finally fessed up.  I found and reported this problem months
>ago, and it took them a month just to get back to me and admit privately
>that there is indeed a problem.  This bug cost me real $$ since I wasted
>time on a fixed price project chasing it.  Naturally I didn't start out
>assuming the processor wasn't executing instructions properly.
>
>Until now, I thought 20MHz was the minimum working speed according to my
>own tests.  4MHz!!!  That's useless!!!  They must have had complete idiots
>working on this design if they didn't catch a timing path that was off by
>a factor of 10.  Yech is right!
>
>I also complained to the head of the division at Masters that Microchip
>was covering up this very serious bug.  He claimed to not know anything
>about it and gave the impression he didn't believe me, but did say he'd
>look into it.  If I was the head of the division, I'd be royally pissed
>that 1) something this blatantly busted ever got shipped in the first
>place, and 2) that I had to find out about it from someone outside
>Microchip.  If he really didn't know about this before, I can imagine some
>cages got rattled pretty hard.  It may not be a coincidence that this
>errata came out 1 1/2 weeks after Masters.
>
>
>*****************************************************************
>Embed Inc, embedded system specialists in Littleton Massachusetts
>(978) 742-9014, http://www.embedinc.com
>
>--
>http://www.piclist.com#nomail Going offline? Don't AutoReply us!
>email RemoveMElistservTakeThisOuTspammitvma.mit.edu with SET PICList DIGEST in the body

> On 4 Aug 2003 at 11:18, Alan B. Pearce wrote:
>
> > >I have many hundreds of products in the field
> using the 6620 and
> > >8620, all running at 8MHz so this is a big
> worry.  However, I haven't
> > >seen any evidence of the problem over full
> temperature and voltage
> > >range testing,
> > but
> > >all products use the LF parts which the
> errata doesn't specifically
> > mention.
> >
> > Sounds like it is time for everyone to bombard
> microchip demanding to
> > know when this problem will be fixed.
>
> Well according to the errata doc Microchip say
> "This problem is
> specific to Rev. A3 silicon, and has been
> resolved by Rev. A4 of the
> silicon." Hope that means Rev. A4 chips are
> available now.
>
> --
> Brent Brown, Electronic Design Solutions
> 16 English Street, Hamilton, New Zealand
> Ph/fax: +64 7 849 0069
> Mobile/txt: 025 334 069
> eMail:  brent.brownSTOPspamspam_OUTclear.net.nz
>
> --
> http://www.piclist.com hint: To leave the
> PICList
> spamBeGonepiclist-unsubscribe-requestSTOPspamEraseMEmitvma.mit.edu
>

> -----Original Message-----
> From: Brent Brown [SMTP:EraseMEbrent.brownEraseMECLEAR.NET.NZ]
> Sent: Monday, August 04, 2003 12:42 PM
> To:   @spam@PICLIST@spam@spam_OUTMITVMA.MIT.EDU
> Subject:      Re: [PIC]: You gotta be kidding me (PIC18FXX20 Rev A3)
>
> On 4 Aug 2003 at 11:18, Alan B. Pearce wrote:
>
> > >I have many hundreds of products in the field using the 6620 and
> > >8620, all running at 8MHz so this is a big worry.  However, I haven't
> > >seen any evidence of the problem over full temperature and voltage
> > >range testing,
> > but
> > >all products use the LF parts which the errata doesn't specifically
> > mention.
> >
> > Sounds like it is time for everyone to bombard microchip demanding to
> > know when this problem will be fixed.
>
> Well according to the errata doc Microchip say "This problem is
> specific to Rev. A3 silicon, and has been resolved by Rev. A4 of the
> silicon." Hope that means Rev. A4 chips are available now.
>

> -----Original Message-----
> From: pic microcontroller discussion list
> [TakeThisOuTPICLIST.....TakeThisOuTMITVMA.MIT.EDU] On Behalf Of Bob Ammerman
> Sent: Sunday, August 03, 2003 5:26 AM
> To: TakeThisOuTPICLISTKILLspamspamMITVMA.MIT.EDU
> Subject: [PIC]: You gotta be kidding me (PIC18FXX20 Rev A3)
>
>
> Received from mChip:
>
> Microchip has released a new Errata sheet for the PIC18FXX20
> Rev. A3 Silicon/Data Sheet Errata family of devices.  If you
> are currently using one of these devices please read the
> document located at
> www.microchip.com/download/lit/suppdoc/errata/80129F.pd

> gtyler wrote:
> >                     I have been watching this link with interest as I am
> > currently designing a couple of projects with 18F1220's running at
> > 40Mhz. That link (80129F.pd) has been removed from Microchip's web
> > site,
>
> No, it hasn't.  But, it does help to include the "f" in ".pdf":
>
> http://www.microchip.com/download/lit/suppdoc/errata/80129F.pdf
>
>
> *****************************************************************
> Embed Inc, embedded system specialists in Littleton Massachusetts
> (978) 742-9014, http://www.embedinc.com
>
> --
> http://www.piclist.com hint: To leave the PICList
> EraseMEpiclist-unsubscribe-request@spam@mitvma.mit.edu
>