Javier Marcos asked: >Someone has any experience if it's posible to read several address of >the 16F84 EEPROM while a write cicle has started and is in progress ? No, while the EEPROM write is taking place, no other accesses can take place. myke Check out the "Handbook of Microcontrollers" as a reference for embedded microcontrollers including information on the Intel 8051, Motorola 68HC05, Microchip PICMicro, Atmel AVR and Parallax Basic Stamp: http://www.myke.com/#MCUHand Hunter S. Thompson's quest for the American Dream, this week in the Book Room. http://www.myke.com/Book_Room/book1a.htm