The EEPROM Byte Erase (EEBER) mode will allow each write to the memory array
to erase the selected byte. An erased byte always reads back 0xFF,
regardless of the value written to the EEPROM address.
When erasing the EEPROM, the CPU can continue to run from the Flash. If the CPU starts an erase or write operation while the EEPROM is busy, the CPU will be halted until the previous operation is finished.