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The CompactFlash [CF] specification defines both the Electrical and
Physical specifications for a 50 pin interface residing in one of 2 form
factors.
The electrical specification is identical to
PCMCIA standard. The two form factors differ only in thickness [CF
and CF+ cards];
Type I: dimensions 3.3mm x 36.4mm x 42.8mm (Thickness x
Length x Width).
Type II: dimensions 5.0mm x 36.4mm x 42.8mm (Thickness x
Length x Width).
Version 2.1 allows the length to increase 50mm to 135mm.
The thickness may be increased after 39.5mm from the connector.
A CF Type I card will operate in a CF Type I or CF Type II slot.
CompactFlash card use flash devices to store data with out the requirement of a battery [nonvolatile]. CompactFlash cards are used as a removable storage device using ATA compatibility [ATA-4]. CompactFlash cards designed to version 2 of the specification operate up to 16MBps. Revision 3 of the CompactFlash standard add Ultra DMA33 and Ultra DMA66 speeds providing up to 66MBps of data. CompactFlash cards can operate with either 3.3 volts or 5.0 volt systems. Adaptors are available to convert CompactFlash cards to PCMCIA Form Factor; CompactFlash [CF] is electrically identical to PCMCIA, and operate using either 8 or 16 bit data width. CompactFlash readers are also called Digital Media Reader. The newest version is called CF+.
CF Card is also called CF Memory Card, and Compact Flash Card
CF+ and CompactFlash Specification Revision 2.0 ~ 2003 [16MB/sec data
transfer rate]
CF+ and CompactFlash Specification Revision 3.0 ~ 2006 [66MBps data
transfer rate]
CompactFlash and CF+ cards operate using either 5.0V [75mA] or 3.3V [100mA] using standard CMOS levels. CF+ cards are either TTL or CMOS compatible.
Samsung {1Gbit to 32Gb SLC Flash components}
IC Manufacturers {All other types}
The CompactFlash or CF+ card uses a standard 50-pin connector [2 rows of
25 pins]. The 50-pin connector is on 50-mil centers [1.27mm].
Pin lengths
for both CF and CF+ standards are defined so that power is applied first
and removed last during card insertions.
AVX {CompactFlash Connector Type II}
FCI {CompactFlash Connector Manufacturer}
Molex Inc. {CF connectors for CF Cards, Type I CF to PC Card adapters}
CompactFlash uses a 50-Pin connector. Active low signal use a '-' prefix.
The CompactFlash card operates in one of three modes. The function of
some of the pins change with each mode.
The three modes are PC Card ATA
using I/O mode, PC Card ATA using Memory mode, and True IDE mode
compatible with most IDE drives.
Refer to these pages for a pin out of
CompactFlash in one of three modes of operation.
PC Card Memory Module
Pinout
PC Card I/O Mode
Pinout
True IDE Mode Pinout
Engineering Design Key words: CompactFlash, CF, CF+, Personal Computer Memory Card International Association, PC Card, Interconnect, Electrical layer, Pinout Standard, Interface Standard Data Bus, Standard, Specification, Spec, Interface, IC, Physical Interface, Description, Manufacturer, Personal Computer, Pin assignment, PC, CompactFlash pin out, Pin-out, Signal Assignment, Connector Pins, Removable Flash Memory, Form factor
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