I'm not sure exactly what the difference is either, but Why does the PIC 16F87x data sheet have fifferent endurance figures for the "flash" part of memory than for the "eeprom" part? the data sheet quotes on page 157:: Ep typical 1000 (flash endurance) Ed typical 100 000 (eeprom endurance) looks to me like different technology....... regards, Kevin -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST