Jan-Erik Soderholm wrote:

> OK, let's say 10 years sharp...
> 
> That's 1 gear change aprox each 15 seconds, 24 hours a day,
> 365 days a year, during 10 years. 

What's exactly your point? That 20M is enough? I haven't said otherwise.
Your numbers match mine: 20M /will/ be enough. 


>> And I'm almost sure there are other applications out there where someone
>> had to count more than 100k events in EEPROM.
> 
> Keeping a counter in RAM and copying to EEPROM regulary (and probably
> saving to EEPROM on a power loss) ?

How often is "regularly"? Saving to EEPROM on power loss can by tricky.
Probably needs extra components = extra cost.

> Using a Ramtron FRAM device ?

More expensive than the EEPROM in the processor. What are the advantages
this higher cost would buy me? (The higher speed of the FRAM is not needed,
and the additional space the EEPROM counter needs is there.)

Gerhard

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist