I'm not sure, but did yo ever reply to the question about if there was any other writes to the EEPROM during production use ? One major questions is, does the EEPROM fail during read-only use or due to missing "refresh" ? --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .