Re: Flash retention in uC at higher temps, experience?

Jim Granville wrote:
> Joerg wrote:
> 
> <snip>
>>
>> I wish the MSP430 was available in automotive but it ain't. At least 
>> not according to the TI rep.
> 
> For more critical uses, Infineon seem to have well-spec'd uC -
> their new ones all have Error Correcting Flash, and 125'C models.
> 
> http://www.infineon.com/XC800
> 
> Also recently added are a series of Transmitter ICs for Wireless 
> Control, that have Sub 1GHz Transmitters, and Low power Flash C51's
> - one targets Tire Pressure, at Automotive temp range.
> http://www.infineon.com/cms/en/product/promopages/pma5110/index.html
> 

Aha! Thanks. Seems there is some hope. Although I am not much of an 
Infineon fan. The reaction time of their CA office can be, well, just 
like the name suggests, infinity.

> 
> Flash retention is one of those 'fingers crossed' specs from most
> suppliers. They cannot TEST years of use, so they do a little 
> extrapolation, and we all know, extrapolation is dangerous :)
> 

Yes, like global warming :-)

Hold the tomatoes ...

> 
>> One could add some code so it re-flashes itself once in a while, 
>> that's another option here. 
> 
>  From What ?
> 

Copy sectors 1-10 consecutively into RAM, write them to sectors 11-20, 
assert start location 11, disassert start location 1. A month later the 
other way around. And so on. Just like rotating a wood pile so it dries 
evenly.

-- 
Regards, Joerg

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