Thursday 7 May 2015

Flash Memory (NAND & NOR)



Flash memory is an electronic non-volatile computer storage medium that can be electrically erased and reprogrammed.
Introduced by Toshiba in 1984, flash memory was developed from EEPROM (electrically erasable programmable read-only memory). There are two main types of flash memory, which are named after the NAND and NOR logic gates.
NAND flash memory is a type of non-volatile storage technology that does not require power to retain data.
An important goal of NAND flash development has been to reduce the cost per bit and increase maximum chip capacity so that flash memory can compete with magnetic storage devices like hard disks. NAND flash has found a market in devices to which large files are frequently uploaded and replaced. MP3 players, digital cameras and USB drives use NAND flash.
A pocket PC, for instance, may use embedded NOR to boot up the operating system.

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