What is the EEPROM, what is it used for?
The EEPROM, or Electrically Erasable Programmable Read Only Memory, it is a form of memory that is supposed to remember data without being powered like a ROM, but also capable of being written to. The PCR1000 uses a very small, standard I2C bus 128 byte EEPROM, a XICOR 24C01A. Only ICOM know exactly what the data held in this EEPROM is used for, but generally such radios hold calibration data that is specific to the individual radio, data such as tracking filter look up tables and VCXO calibration values etc. Often other items such as unit configuration, serial numbers or elapsed time recorders are also held in the EEPROM.
