I have the problem that I cannot erase the EEPROM completely. I connect via JTAG and use the EEPROM programmer. If I erase everything with 0x00 then the fields 0x00 to 0x80 are 0x00. However, from 0x80 to 0x100 the field are still 0xFF. this pattern is repeating itself.
As EEPROM I use the 24LC512 from Microchip with 512 kbit.