Flash Memory

Today Flash memory is everywhere in Pen drives, Digital camera, MP3 players and in almost all portable electronic devices. Flash memory is a Non volatile Erasable memory device that can be reprogrammed. Dr.Fujio Masuoka of Toshiba introduced the Flash memory in 1984 to the world.

Continue in this link http://www.engineersgarage.com/contribution/what-is-flash-memory


3 thoughts on “Flash Memory

  1. mercadeo 25 Jan 2012 / 12:24 am

    Flash memory works by modulating charge ( electrons ) stored within the gate of a MOS transistor . The gate is constructed with a special “stack” designed to trap charges (either on a floating gate or in insulator “traps” ). The presence of charge within the gate shifts the transistor’s threshold voltage , higher or lower, corresponding to a 1 to 0, for instance. Changing the bit’s state requires removing the accumulated charge, which demands a relatively large voltage to “suck” the electrons off the floating gate. This burst of voltage is provided by a charge pump , which takes some time to build up power. General write times for common Flash devices are on the order of 0.1ms (for a block of data), about 10,000 times the typical 10 ns read time, for SRAM for example (for a byte).

  2. loneziddik 19 Jan 2012 / 12:58 am

    outstanding post mohan sir!

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