On 2/16/07, stef mientki <s.mientki@mailbox.kun.nl> wrote:
> Vasile Surducan wrote:
> > How much time is alowed from power fault start till complete data
> > written occure
> we've a startup delay of 2 seconds
> > and how did you solved the energy accumulation during
> > this process ?
> >
> sorry what do you mean by that ?

I mean the supply must be stable all the time between the failure
starts and all data have been stored in EEprom. During this period the
supply must remain clean and above minimal value recommended.

> > I'll dare to say is much simple to supply the system with a LI-Ion backup cell.
> >
> Maybe, but as
> - these system are all over the world (and it's easy to exchange the
> software)
> - We're still working with a not completely stable compiler, but you
> know that ;-)
> - and I want to UNDERSTAND this weird phenomena
> ....
> We did some more tests today,
> and the extra 0x3FFF inserts after a write didn't change anything.

> The PCB's are really bad designed,
> and we see a lot of spikes due to this in combination we a number of
> transformers and inductive loads.

Well, maybe that's the problem.

> We hope to pinpoint the problem next week.
>
> cheers,
> Stef
>
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