Information Technology Reference
In-Depth Information
Table 1-4: CompactFlash cards are available in several formats.
Card
CompactFlash
CompactFlash II
Sponsor
compactflash.org
Physical Size (mm)
36.4 or greater x 42.8 x 3.3
36.4 or greater x 42.8 x 5
Pins
50
Interface
PC Card/True IDE Mode
Data Bus Width (bits)
8 or 16
Maximum Data Transfer Rate
(Mbits/sec.)
528
Power Supply (V)
3.3/5
Security
Security Mode password protection, recommended for use only
in non-removable devices
Specification Cost
none
Licensing Fees and
Royalties
Membership @$2500/year enables using the logo and trade-
marks
Protocols
CompactFlash and CF+ cards with storage media are accessed much like
other ATA hard drives. A series of registers store status and control informa-
tion and data being transferred. The CompactFlash specification defines a
CF-ATA command set for communicating with cards.
Fees
The CF+ and CompactFlash specification is available at no charge. Use of
the CompactFlash logo and trademarks on products requires membership in
the CompactFlash association at $2500 per year.
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