AVR-Chat

----Original Message----

From: AVR-Chat@yahoogroups.com
[mailto:AVR-Chat@yahoogroups.com] On Behalf Of Roland
Jollivet Sent: 23 September 2009 14:49 To:
AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] Re:
Mega128 apparently losing programming 

> It obviously sounds like they were never programmed in
> the first place. 
> Maybe they slipped through. Is there any E^2 or RTC that
> was supposed to be programmed too? Is that there? 

Well that's how it sounds to me too. I think there must have been some
mixup somewhere along the line, as they are totally convinced that they
were all tested. There's no eeprom or anything to check, just flash and
fuse bits. Atmel say that while it would be theoretically possible to
"accidentally" generate a flash erase command by zapping the SPI pins,
there's no way you'd get the fuse bits going back to factory defaults
without specifically programming them to those settings (the application
settings are a lot different to the defaults).

I just thought I would ask if anyone in the wider world had heard of
such a "memory loss" happening.

-- 
Tim Mitchell

I'm curious just how they're tested, and is every unit tested before it goes
out? I have never heard of that happening either.

Zack

On Wed, Sep 23, 2009 at 9:15 AM, Tim Mitchell <tim@sabretechnology.co.uk>wrote:

>
>
> ----Original Message----
> From: AVR-Chat@yahoogroups.com <AVR-Chat%40yahoogroups.com>
> [mailto:AVR-Chat@yahoogroups.com <AVR-Chat%40yahoogroups.com>] On Behalf
> Of Roland
> Jollivet Sent: 23 September 2009 14:49 To:
> AVR-Chat@yahoogroups.com <AVR-Chat%40yahoogroups.com> Subject: Re:
> [AVR-Chat] Re:
> Mega128 apparently losing programming
>
> > It obviously sounds like they were never programmed in
> > the first place.
> > Maybe they slipped through. Is there any E^2 or RTC that
> > was supposed to be programmed too? Is that there?
>
> Well that's how it sounds to me too. I think there must have been some
> mixup somewhere along the line, as they are totally convinced that they
> were all tested. There's no eeprom or anything to check, just flash and
> fuse bits. Atmel say that while it would be theoretically possible to
> "accidentally" generate a flash erase command by zapping the SPI pins,
> there's no way you'd get the fuse bits going back to factory defaults
> without specifically programming them to those settings (the application
> settings are a lot different to the defaults).
>
> I just thought I would ask if anyone in the wider world had heard of
> such a "memory loss" happening.
>
> --
> Tim Mitchell
>
>  
>


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