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4. Product Specification
The CompactFlash is a small form factor non-volatile memory card which provides high capacity data storage. Its
aim is to capture, retain and transport data, audio and images, facilitating the transfer of all types of digital
information between a large variety of digital systems.
The Card operates in three basic modes:
PC card ATA I/O mode
PC card ATA memory mode
True IDE mode
The CompactFlash also supports Advanced Timing modes. Advanced Timing modes are ATA I/O modes that are
100ns or faster, ATA Memory modes that are 100ns or 80ns.
Standard cards are shipped as max. PIO6 and MDMA4 (80ns) and UDMA4 (30ns).
If the cards should be used in extended speed modes, they should be qualified on the target system and the
system should fulfill the requirements listed below.
It conforms to the PCMCIA Card Specification 2.1 when operating in the ATA I/O mode, and in the ATA Memory mode
(Personal Computer Memory Card International Association standard, JEIDA in Japan), and to the ATA specification
when operating in True IDE Mode. CompactFlash Cards can be used with passive adapters in a PC-Card Type II or
Type III socket.
The Card has an internal intelligent controller which manages interface protocols, data storage and retrieval as
well as hardware RS-code Error Correction Code (ECC), defect handling, diagnostics and clock control.
The wear leveling mechanism assures an equal usage of the Flash memory cells to extend the life time.
Once the Card has been configured by the host, it behaves as a standard ATA (IDE) disk drive. The hardware RS-
code ECC allows to detect and correct 4 symbols per 528 Bytes.
The Card has a voltage detector and a powerful power-loss management feature to prevent data corruption after
power-down.
The specification has been realized and approved by the CompactFlash Association (CFA).
This non-proprietary specification enables users to develop CF products that function correctly and are compatible
with future CF design. The system highlights are shown in Table 2 … Table 8.
Related Documentation
PCMCIA PC Card Standard, 1995
PCMCIA PC Card ATA Specification, 1995
AT Attachment Interface Document, American National Standards Institute, X3.221-1994
CF+ and CompactFlash Specification Revision 3.0
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.51
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-300_data_sheet_CF-HxBK_Rev151.doc
Page 7 of 99
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