Flash is a memory chip

Flash is a memory chip, can be modified by a specific program within the data.

 

Flash memory is also known as flash memory, which combines the strengths of ROM and RAM, not only with e-erasable programmable (EEPROM) of the performance, but also will not lose data while power can be quickly read data (NVRAM advantage), U disk and MP3 is used in this memory. In the past 20 years, embedded systems have been using ROM (EPROM) as their storage device, but in recent years, Flash-round instead of ROM (EPROM) position in the embedded systems used for storage and operating system or program Bootloader use code or directly when the hard disk (U disk).

 

Currently there are two Flash NOR Flash and NAND Flash. NOR Flash read and read our popular SDRAM is the same, the user can run the load inside the code in NOR FLASH, thus reducing the capacity of SRAM to save costs. NAND Flash did not take random access memory technology, it is to read a piece in the form of a read, which usually is the time to read 512 bytes, using this technology, Flash and relatively inexpensive.

 

Users can not directly run the code on the NAND Flash, so a lot of the development board using the NAND Flash in addition to using NAND Flash, is also made on a piece of NOR Flash to run a small startup code. The general use of small capacity NOR Flash, because of its fast read speed, multi-operating system used to store important information, and use high-capacity NAND FLASH, NAND FLASH the most common applications are embedded systems used in DOC (Disk On Chip) and we usually use the "flash" erase online.

 

FLASH is currently available in the market mainly from Intel, AMD, Fujitsu and Mxic, while the main production of NAND Flash manufacturers are Samsung and Toshiba and Hynix.