This issue was mentioned in the 16F627 Errata with a possible workaround:

http://ww1.microchip.com/downloads/en/DeviceDoc/80151M.pdf

Tamas


On Fri, Mar 28, 2008 at 7:09 AM, Bob Axtell <engineer@cotse.net> wrote:

> Jinx wrote:
> >> Interestingly, he told me that the problem is that the "done" flag
> >> never gets set, so the code hangs. He doesn't see bad data.
> >>
> >
> > I've had bad firmware (I2C for example) flags on some PICs under
> > certain not unusual and not out-of-spec conditions. I reported this to
> > Microchip and they confirmed it. Eventually
> >
> > Think Bob A has mentioned unreliable flags too
> >
> >
> >
> >
> Yes, I found some problems in the PIC12F675/629, but I got the
> workaround from Microchip from
> another PIC. But Microchip never announced the problem in the
> PIC12F675/629. I still use the workaround
> so I don't know if they fixed it or not.
>
> --Bob A
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