hi actually i have connected it to the pin RC3 and RC4 as in the scl and sda pin of 16f73 .i tried following the instruction inthe data sheet fo 24c02 eeprom.it didnt work.all a0 a1 a2 connected to gnd.wp set to no write protect.now just the data transmission to the eeprom is required .i am stuck.SOS SOS SOS........... -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.