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Flash memory is a form of non-volatile memory that can be electrically erased and rewrite, which means that it does not need power to maintain the data stored in the chip. In addition, flash memory offers fast read access times and better shock resistance than hard disks. These characteristics explain the popularity of flash memory for applications such as storage on battery-powered devices. Flash memory is advance from of EEPROM (Electrically-Erasable Programmable Read-Only Memory) that allows multiple memory locations to be erased or written in one programming operation. Unlike an EPROM (Electrically Programmable Read-Only Memory) an EEPROM can be programmed and erased multiple times electrically. Normal EEPROM only allows one location at a time to be erased or written, meaning that flash can operate at higher effective speeds when the systems using; it read and write to different locations at the same time. Business - Click the link on the left to visit our partner sites under business/finance/loan/mortgage category Computers - Click the link on the left to visit our partner sites under computer hardware/software/peripheral category Internet - Click the link on the left to visit our partner sites under webhosting/webdesign/internet marketing category Software - Click the link on the left to visit our partner sites under software category Web Design - Click the link on the left to visit our partner sites under web design/development category Web Hosting - Click the link on the left to visit our partner sites under web hosting category Web Promotion - Click the link on the left to visit our partner sites under search engine optimization/internet marketing category Web Resources - Click the link on the left to visit our partner sites under other web category Recreation - Click the link on the left to visit our partner sites under travel/hotel/cruise category Casino - Click the link on the left to visit our partner sites under online gambling/poker/blackjack/roulette category Health - Click the link on the left to visit our partner sites under online pharmacy/hospital/health category Shopping - Click the link on the left to visit our partner sites under online shopping/gift category Miscellaneous - Click the link on the left to visit our partner sites under all other categories
Flash memory stores one bit of information in an array of transistors, called "cells", however recent flash memory devices referred as multi-level cell devices, can store more than 1 bit per cell depending on amount of electrons placed on the Floating Gate of a cell. NOR flash cell looks similar to semiconductor device like transistors, but it has two gates. First one is the control gate (CG) and the second one is a floating gate (FG) that is shield or insulated all around by an oxide layer. Because the FG is secluded by its shield oxide layer, electrons placed on it get trapped and data is stored within. On the other hand NAND Flash uses tunnel injection for writing and tunnel release for erasing. |
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