| Compact Flash card (CF) is a type of a
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| | solid state, can be electrically erased
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| data storage device, especially useful
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| | and rewritten. Flash memory allows
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| for portable electronic devices. It can
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| | multiple memory locations to be erased or
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| be used directly in a CF card slot with
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| | written in one programming operation. It
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| an adapter. It makes use of flash memory.
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| | can thus operate at much higher
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| Based on physical features, there are two
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| | read-access speeds. Better shock
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| types of Flashcards: Type I (3.3mm thick)
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| | resistance than hard disks is another of
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| and the thicker Type II (CF2) cards (5mm
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| | its useful feature. Features as these
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| thick).
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| | make these cards much more preferable
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| First produced by SanDisk in 1994,
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| | over the others such as battery-powered
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| Compact Flash card is among the first and
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| | devices.
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| the oldest and also the most successful
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| | A limitation of this card is that being
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| brands and is now used for a variety of
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| | easily rewritable memory, it can be
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| devices which includes laptops, portable
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| | overwritten without warning leading to
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| audio recorders and desktop computers and
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| | loss of data. System failure, power
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| cameras.
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| | fluctuations, corruption caused by
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| Flash memory devices consume very less
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| | hardware crash or software malfunctions
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| power and yet have good transfer speeds.
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| | are the other limitations.
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| They can also be switched from one system
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| | Flash memory stores one bit of
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| to another. They are also designed to
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| | information in an array of transistors,
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| adjust to very rapid changes in
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| | called 'cells'. Compact Flash cards are
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| temperature or in voltage. The storage
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| | built on the basis of the type of logic
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| capacity of a Compact Flash card ranges
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| | gate used in each storage cell and are
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| from 128 MB to about 64 GB. However, 256
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| | thus of two types: NOR flash and NAND
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| MB and 2 GB are the most popular choices
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| | flash. Recently however, some flash
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| in Europe.
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| | memory devices called multi-level cell
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| Flash memory has a specific quality which
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| | devices, can store more than one bit per
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| allows a section of its memory cells to
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| | cell. NOR flash cell has two gates: the
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| get erased in a single 'flash', very much
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| | Control Gate and the Floating Gate. NAND
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| reminiscent of a camera flash function.
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| | Flash has a different mechanism: tunnel
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| This reminds one of the ease with which
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| | injection for writing and tunnel release
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| erasure of data can be carried out,
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| | for erasing.
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| freeing space for recording new data onto
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| | The market demand today is tilting
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| it. Flash memory being non-volatile and
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| | towards the lower-priced NAND flash.
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