piclist 2002\08\05\005111a >
Thread: Flash endurance
face picon face BY : Jinx email (remove spam text)

I need 512k x 8 storage space which can be done with a single
29C040A Flash. The quoted figure for Flash is > 10,000 write
cycles. I "might" have a look at battery backed-up SRAM, I've a
few 8M TSOPs, but truly NV is preferable

Does the endurance refer to the number of times a bit changes
state or the number of times that bit is written to, whether it
changes state or stays the same ? As the PIC's Flash memory
can be re-programmed ~1,000 times that makes me wonder.
Could that be Microchip's definition of > 10,000, ie 14 bits x 1,000 ?

If, (as I think because the 29C040A data doesn't say otherwise),
it means each sector can be over-written 10,000 times however
the contents change, then I'm OK, else I'll go with 8 x 24C512
EEPROM (> 10,000,000 writes but more board and 3x the price)

http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

<001f01c23c3b$9fb56f00$9a95a7cb@joe> 7bit

See also: www.piclist.com/techref/mems.htm?key=flash
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) Flash endurance

month overview.

new search...