Flash memory is an electronic non-volatile computer storage medium that can be electrically erased & reprogrammed. Introduce by Toshiba in 1984, Flash memory was developed from EEPROM.
Two logical technical thing use are:-
1) NAND Flash:-
NAND Flash reads & writes sequentially at high speed, handling data in small blocks called pages. This flash is used in solid-state & USB flash drives, digital cameras, audio & video players & TV set-top box. NAND flash reads faster than it writes quickly transferring whole pages of data.
2) NOR Flash:-
NOR Flash provides high-speed random access reading & writing data in the specific memory location, it can retrieve as little as single-byte NOR is used to store cell phones operating system its also used in computers for the BIOS program that runs at startup.
Applications of Flash Memory
Introduced in 2002, USB drives encapsulation flash with a memory controller in a small package offering high capacity, fast transfer rate, flexible & convenience.
Compact Flash cards introduced in 1994 through 2001 postage-stamp-size secure digital cards to the latest mini SD & microSD cards with higher capacities & faster transfer speeds at every step.
The newest flash memory application SSD can replace a computer’s hard drives. They have no moving parts so mechanical failure near zero. SSD is quieter & smaller than hard drive & they provide faster response, access & boot-up consume much less power & run cooler.