Non-Volatile Memory Chips

Topics: Flash memory, Read-only memory, BIOS Pages: 3 (962 words) Published: February 25, 2013
Non-volatile memory chips - is computer memory that once you turn off the computer the information is still there.. Examples of non-volatile memory include read-only memory, flash memory, ETC . Non-volatile memory is typically used for the task of secondary storage, or long-term persistent storage * Rom – MASK ROM PROM , EPROM , EEPROM

PROM : Programmable- Read Only Memory is a type of ROM that is programmed after the memory is constructed. The PROM was invented in 1956 by Wen Tsing Chow, working for the Arma Division of the American Bosch Arma Corporation in Garden City, New York. This is an unerasable, non-volatile data storage memory chip. It can be programed one time after it is purchased. It allows the user to choose the data or program to put onto the memory. The memory chip is delivered blank, and the programmer transfers the data onto it. To write data onto a PROM chip, you need a special device called a PROM programmer or PROM burner. The process of programming a PROM is sometimes called burning the PROM. Once the data is transferred, it cannot be changed or erased. The difference between a PROM and a ROM (read-only memory) is that a PROM is manufactured as blank memory, whereas a ROM is programmed during the manufacturing process ` These types of memories are frequently seen in video game consoles, mobile phones, radio-frequency identification (RFID) tags, implantable medical devices, high-definition multimedia interfaces (HDMI) and in many other consumer and automotive electronics products. While PROM cannot be erased, two other versions of PROM have been developed that can be erased and reprogrammed. One type is called EPROM, or Erasable Programmable Read-Only Memory. This type of memory uses floating-gate transistors and can be erased by strong ultraviolet light. The other type is EEPROM, or Electrically Erasable Programmable Read-Only Memory. EEPROM can be erased with an electrical charge and is used in flash memory. EPROM - Erasable...
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