MEMORY FLASH

MEMORY FLASH

1. Is a type memory that can be electronically erased and reprogrammed

   • preserves the information stored on the chip when it is turned off
     • offers fast read access times with transfer rates of 12MB per second
       • data is stored in multiple floating gates transistors, called cells
         • Each cell stores one bit of data
         • The new devices have a multi-level cell structure, so they can store more than one bit per cell
         • are built with NOR or NAND gates
           • NOR chips function as main memory
           • NAND chips work like a hard drive
           • The future of flash drives may be hybrid hard drives
             • a magnetic hard drive and flash memory in one device
             • SanDisk card readers read and write to almost all flash memory cards

2. used in various ways

   • Many PCs have their BIOS stored on a flash memory chip
     • Modems use flash memory
       • USB flash drives are used for saving and moving MP3 and other data files between computers
         • USB flash drives have less storage capacity than hard drives
         • New U3 smart drives allow users to store both apps and data
           • Flash memory cards are used to store images, to back up data, to record Voice and music on MP3 players or to store movies on MP4 players