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The CompactFlash® Memory Card products provide high capacity solid-state flash memory that electrically complies with the Personal Computer Memory Card International Association ATA (PC Card ATA) standard. (In Japan, the applicable standards group is JEIDA.) The Compact Flash Memory Card Series also supports a True IDE Mode that is electrically compatible with an IDE disk drive. The original CF form factor card can be used in any system that has a CF slot, and with a Type II PCMCIA adapter can be used in any system that has a PCMCIA Type II or Type III socket.
Compact Flash Memory cards use Flash memory, which was designed by specifically for use in mass storage applications. In addition to the mass storage-specific flash memory chips, Compact Flash Memory cards include an on-card intelligent controller that provides a high level interface to the host computer. This interface allows a host computer to issue commands to the memory card to read or write blocks of memory. The host addresses the card in 512 byte sectors. Each sector is protected by a powerful Error Correcting Code (ECC).
The on-card intelligent controller in the Compact Flash Memory Card manages interface protocols, data storage and retrieval as well as ECC, defect handling and diagnostics, power management and clock control. Once the card has been configured by the host, it appears to the host as a standard ATA (IDE) disk drive. Additional ATA commands have been provided to enhance system performance.
The host system can support as many cards as there are Compact Flash and PCMCIA Type II or III card slots. The original form factor Compact Flash Memory.