Hi! >I found some source code to read an eeprom using master mode i2c, but for >the >adress it use only one byte. ?How can I access an adress above FF? This depends on the used chip. On smaller chips (ie. series 24xx up to the 2416) the hardware address bits will be replaced by the upper bits of the memory address. On larger chips (2432 +) you can address the memory by 2 bytes of address (16 bit). This is maybe not a big help for you due my bad english, so the best will be to take a look to the datasheets (there a lot on www.microchip.com and www.atmel.com for the 24xx series) and you'll see it's easy as pie. cu, Christian -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics