Lpc2000

At 02:22 AM 6/19/05 +0000, foreigner_ca wrote:
>I'm thinking of using the LPC2138 in a design that must have a 20
>year life cycle. The literature says the flash has only 10 year
>retention, but in other flash devices that is affected by
>temperature, write cycles etc.

The 2104 data sheet claims a 20 year retention time.  The 2138 datasheet 
claims 20 years in the text but doesn't list retention in the 
characteristics section.

>Is there any more detailed info on this? For example, if I only write
>to the flash a few times and keep the temperature below 60C, can I
>expect longer retention?

I would expect it to be more related to temperature than programming 
cycles.  At least until you have a significant number anyway, say a few 
thousand or so.   In fact I would expect it to be quite non-linear with 
temperature.  It would be interesting to have the information.  Perhaps 
philips_apps can point us to an appnote or suggest one be written?

Robert

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