CompactFlash
CompactFlash (CF) is a name of a standard used for a mass storage device, which is mostly used in digital cameras. Today, most CompactFlah devices use flash mem…
CompactFlash (CF) is a name of a standard used for a mass storage device, which is mostly used in digital cameras. Today, most CompactFlah devices use flash memory. Since most CompactFlash cards have no movable parts, they are also used in embedded systems. Compact flash cards are 36.4 mm by 42.8 mm in size, and either 3.3 mm or 5 mm thick. The 3.3 mm type is known as Type I, the 5 mm type is known as Type II. Most type II devices are small hard disks. The transfer speed is often given as an x rating, where the base is 150 kB/s for 1x speed, which was also the base speed for reading compact discs.
In many cases, reading is faster than writing, often by a factor of two to three. That way, a speed of "133x" is roughly that of 20 MB/s. When the speed is given as a rate, usually in MB/s, this speed is the maximum speed that can be obtained reading from the device.
There are ComactFlash devices of different capacities.
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