What is EEPROM?

EEPROM (Electrically Erasable Programmable Read Only Memory) is a non-volatile ROM chip that can store a small volume of data in electronic devices. However, it can be erased and reprogrammed repeatedly using higher-than-normal voltages. They do not need any additional equipment for altering the content. 

The EEPROMs need not be removed from the device; then, erasing and reprogramming must be done entirely. The read and write cycle of the EEPROM is slower than the RAM. The EEPROM can be reprogrammed several times, and the data erasing is immediate and only through electrical means.

Types

The main types of EEPROM memory are as follows:

Serial EEPROM

Data is transferred serially and is slower than the parallel EEPROM. They are cheaper and less dense.

Parallel EEPROM

The operations are faster and more reliable, and denser. These memory devices are compatible with the EPROM and other flash memory solutions.

Applications of EEPROM

Some of the applications of EEPROM include being used as the BIOS chip in computers. It can also be used as a storage device for inbuilt self-learning capability in remotely operated transmitters. They can also be used as storage in test equipment.

EEPROMs are usually used to store configuration parameters and replace the CMOS non-volatile BIOS. Flash memories are an advanced form of EEPROM.