Flash Memory

Flash Memory A semiconductor that preserves data even when the power is off. Unlike the memory semiconductors, such as DRAM and SRAM, which forget all saved data once the power is turned off, flash memory is a type of non-volatile memory that preserves data even without power. Flash memory uses an electrodynamic method to input and output data as desired, uses little electrical power, and can be programmed at ultra fast speeds. Normally speaking, each DRAM cell is composed of 1 transistor and 1 capacitor. On the other hand, a flash memory cell is composed of 1 transistor. As it has both benefits of ROM that preserves data even when the power is turned off and RAM that can easily input and output data, it is used as high-capacity data storage in portable devices like digital cameras, MP3, cellphones, USB drives, and more. Flash memory is sorted based on the shape of the electrical circuits within the semiconductor chip, into NAND (for saving data) and NOR (for saving code). It is easier to increase the storage capacity for NAND flash, while NOR flash reads data faster.