EEPROM (Electrically Erasable Programmable Read-Only Memory) is a non-volatile memory chip that allows in-system byte-level electrical erasing and programming without data loss after power-off. It can be repeatedly rewritten with electrical signals without dedicated equipment, featuring relatively low read/write speed but long endurance and high flexibility. It is mainly used to store small-capacity critical data such as device configurations, serial numbers, calibration parameters and user settings, widely applied in microcontrollers, home appliances, industrial control, sensors, automotive electronics and other fields.