CF+ and CompactFlash Specification Revision 3

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CompactFlash

Specification

Revision 3.0

12/23/04

CompactFlash Association

P.O. Box 51537

Palo Alto, CA 94303

Tel: 650-843-1220

Fax: 650-493-1871

Email: cf@compactflash.org

Association.

Rev. 3.0 12/2004 Printed in U.S.A

TABLE OF CONTENTS

1 GENERAL............................................................................................................................................1

1.1 Introduction....................................................................................................................................1

1.2 CFA Goals and Objectives............................................................................................................1

1.3 Overview of CompactFlash Storage Card...................................................................................1

1.4 Related Documentation.................................................................................................................2

1.5 Compatibility Requirements.........................................................................................................2

1.6 Acknowledgement..........................................................................................................................3

2 SCOPE...................................................................................................................................................2

2.1 Elements of this Specification.......................................................................................................2

2.2 Card Physical .................................................................................................................................2

2.3 Electrical Interface.........................................................................................................................2

2.4 Metaformat.....................................................................................................................................2

2.5 Software Interface..........................................................................................................................2

2.6 CompactFlash Adapters................................................................................................................2

3 CARD PHYSICAL...............................................................................................................................3

3.1 General Description.......................................................................................................................3

3.1.1 CompactFlash Storage Card......................................................................................................3

3.1.2 CF+ Card...................................................................................................................................3

3.2 CompactFlash Storage Card and CF+ Card Physical Specifications.......................................4

3.2.1 CF+ & CompactFlash Type I and Type II Cards.......................................................................4

3.2.2 Recommendations for Longer Type I and Type II Cards..........................................................7

3.2.3 CF+ Type I Extended ................................................................................................................9

3.3 Connector Interface Specifications.............................................................................................11

3.3.1 CF/CF+ Card Connector..........................................................................................................11

3.3.2 Host Connector........................................................................................................................12

4 ELECTRICAL INTERFACE...........................................................................................................23

4.1 Physical Description.....................................................................................................................23

4.1.1 Pin Assignments and Pin Type................................................................................................23

4.2 Electrical Description ..................................................................................................................23

4.3 Electrical Specification................................................................................................................31

4.3.1 Current Measurement..............................................................................................................32

4.3.2 Input Leakage Current.............................................................................................................32

4.3.3 Input Characteristics................................................................................................................33

TABLE OF CONTENTS

4.3.4 Output Drive Type...................................................................................................................33

4.3.5 Output Drive Characteristics...................................................................................................34

4.3.6 Signal Interface........................................................................................................................35

4.3.7 Additional Requirements for CF Advanced Timing Modes....................................................36

4.3.8 Ultra DMA Electrical Requirements.......................................................................................37

4.3.8.1 Host and Card signal capacitance limits for Ultra DMA operation..................................37

4.3.8.2 Series termination required for Ultra DMA operation .....................................................37

4.3.8.3 Printed Circuit Board (PCB) Trace Requirements for Ultra DMA..................................38

4.3.8.4 Ultra DMA Mode Cabling Requirement..........................................................................38

4.3.9 Interface/Bus Timing...............................................................................................................38

4.3.10 Attribute Memory Read Timing Specification........................................................................38

4.3.11 Configuration Register (Attribute Memory) Write Timing Specification...............................40

4.3.12 Common Memory Read Timing Specification........................................................................41

4.3.13 Common Memory Write Timing Specification.......................................................................43

4.3.14 I/O Input (Read) Timing Specification....................................................................................45

4.3.15 I/O Output (Write) Timing Specification................................................................................47

4.3.16 True IDE PIO Mode Read/Write Timing Specification..........................................................48

4.3.17 True IDE Multiword DMA Mode Read/Write Timing Specification.....................................50

4.3.18 True IDE Ultra DMA Mode Read/Write Timing Specification..............................................52

4.3.18.1 Ultra DMA Overview.......................................................................................................52

4.3.18.2 Ultra DMA Phases of Operation ......................................................................................53

4.3.18.2.1 Ultra DMA Burst Initiation Phase Rules ...................................................................54

4.3.18.2.2 Ultra DMA Data transfer phase rules ........................................................................54

4.3.18.2.3 Ultra DMA Burst Termination Phase Rules..............................................................54

4.3.18.3 Ultra DMA Data Transfers Timing..................................................................................55

4.3.18.3.1 Initiating an Ultra DMA Data-In Burst......................................................................59