That's probably why i managed to get a quantity of '84s cheap on ebay...DOH!
----- Original Message -----
From: "Vasile Surducan" <piclist9@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Thursday, November 24, 2005 12:21 PM
Subject: Re: [PIC] Ever seen PIC program memory "forget"?


> On 11/24/05, Barry Gershenfeld <barry_g@zmicro.com> wrote:
> > We have some claims that certain PIC parts have been turning up with bad
> > programming.  As in, "It failed during burn in, so we reflashed it, and
now
> > it's fine".  This is the sum total of the research, so if you're
thinking
> > "hearsay" or "rumor", you may be close.   I have requested that any of
> > these defective parts be sent to me so I can at least determine if we're
> > talking bits, bytes, blocks, or the whole program segment.
> >
> > What I want to know is, has anyone ever seen such a thing in the PIC
> > line?
>
> Yes,  three years ago with PIC16F84. The problems appears after 2-3
> monts after burning. After reflashing, everything goes fine until
> again the memory was lost.
> Replacing the chip solve the problem.
>
> Vasile
>
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