Mike Singer wrote: > David VanHorn wrote: >> I've done this in other devices, by specifying several fields for the data, >> and a pointer to which field is in use. The pointer only gets updated when >> you change fields, so it never wears out in any practical sense. > > There is exact number the pointer getting updated for 8-bit devices. It's 256. > 256 * 100K =~ 25M, pretty much close to specified value (20M). > Paying attention to numbers makes Engineer according to Olin ;-) Are you suggesting to use one EEPROM byte to count until 256, then increment a pointer and use the next EEPROM byte to count the next 256 events? How would you reach 20M (or 25M) counts with this scheme? > Wear out cells equally. Why this? Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist