This document discusses the EEPROM memory in AVR microcontrollers. It explains that EEPROM is non-volatile memory that can retain data when power is removed. The AVR has 512 bytes of internal EEPROM memory addressed using the 9-bit EEAR address registers EEARH and EEARL. Data is written to and read from the EEDR register, while the EECR register controls writing, reading, and interrupts for the EEPROM.