SDI Technologies SDIO Card manual Table of Contents

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©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

Table of Contents

1. General Description		1
1.1	SDIO Features	1
1.2	Primary Reference Document	1
1.3	Standard SDIO Functions	1

2. SDIO Signaling Definition		2
2.1	SDIO Card Types	2
2.2	SDIO Card modes	2
2.2.1 SPI (Card mandatory support)		2
2.2.2 1-bit SD Data Transfer Mode (Card Mandatory Support)		2
2.2.3 4-bit SD Data Transfer Mode (Mandatory for High-Speed Cards, Optional for Low-Speed)		2
2.3	SDIO Host Modes	2
2.4	Signal Pins	3

3. SDIO Card Initialization		4
3.1	Differences in I/O card Initialization	4
3.2	The IO_SEND_OP_COND Command (CMD5)	10
3.3	The IO_SEND_OP_COND Response (R4)	11
3.4	Special Initialization considerations for Combo Cards	12
3.4.1 Re-initialize both I/O and Memory		12
3.4.2 Using a Combo Card as SDIO only or SD Memory only after Combo Initialization		12
3.4.3 Acceptable Commands after Initialization		12
3.4.4 Recommendations for RCA after Reset		12
3.4.5 Enabling CRC in SPI Combo Card		14


4. Differences with SD Memory Specification			15
4.1	SDIO Command List		15
4.2	Unsupported SD Memory Commands		15
4.3	Modified R6 Response		16
4.4	Reset for SDIO		16
4.5	Bus Width		16
4.6	Card Detect Resistor		17
4.7	Timings		17
4.8	Data Transfer Block Sizes		18
4.9	Data Transfer Abort		18
4.9.1		Read Abort	18
4.9.2		Write Abort	18
4.10	Changes to SD Memory Fixed Registers		18
4.10.1		OCR Register	19
4.10.2		CID Register	19
4.10.3		CSD Register	19
4.10.4		RCA Register	19
4.10.5		DSR Register	19
4.10.6		SCR Register	19
4.10.7		SD Status	19
4.10.8		Card Status Register	19

5. New I/O Read/Write Commands		21
5.1	IO_RW_DIRECT Command (CMD52)	21
5.2	IO_RW_DIRECT Response (R5)	22
5.2.1 CMD52 Response (SD modes)		22
5.2.2 R5, IO_RW_DIRECT Response (SPI mode)		23
5.3	IO_RW_EXTENDED Command (CMD53)	24
5.3.1 CMD53 Data Transfer Format		25

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Contents SD Specifications Part E1 Sdio Simplified Specification Date Version Sdio Simplified Specification VersionChanges compared to previous issue Release of SD Simplified Specification Conventions Used in This Document Table of Contents SPI and SD 1-bit Mode Interrupts 16.2 Table of Tables Table of Figures General Description Sdio FeaturesPrimary Reference Document Standard Sdio FunctionsSdio Card Types Sdio Signaling DefinitionSdio Card modes Sdio Host ModesSignal connection to two 4-bit Sdio cards Signal PinsDifferences in I/O card Initialization ResetSdio Card Initialization Sdio Simplified Specification Version MEM=0 Card initialization flow in SD mode Sdio aware host Illegal Command F8=0 Card initialization flow in SPI mode Sdio aware host VDD Voltage Window Position Iosendopcond Command CMD5OCR Values for CMD5 OCR bitIosendopcond Response R4 Response R4 in SD modeRecommendations for RCA after Reset Acceptable Commands after InitializationSpecial Initialization considerations for Combo Cards Re-initialize both I/O and MemoryRe-Initialization Flow for Memory controller Re-Initialization Flow for I/O ControllerEnabling CRC in SPI Combo Card Unsupported SD Memory Commands Differences with SD Memory SpecificationSdio Command List Bus Width Reset for SdioModified R6 Response Timings Card Detect ResistorCombo Card 4-bit Control Card Detect Resistor StatesData Transfer Abort Data Transfer Block SizesChanges to SD Memory Fixed Registers Read AbortCID Register OCR RegisterCSD Register RCA RegisterBit Identifier Type Value Description Sdio Status Register StructureClear Iorwdirect Command CMD52 New I/O Read/Write CommandsIllegalcommand ComcrcerrorIorwdirect Response R5 1 CMD52 Response SD modesIdentifier Type Value Description Clear Condition DIS=DisabledCMD=DAT lines free TRN=TransferIorw Extended command Op Code Definition Iorwextended Command CMD53OP code Command operation CRC1 CMD53 Data Transfer Format Byte Count ValuesSdio Card Internal Operation Register Access TimeOverview InterruptsRead Wait Suspend/ResumeCMD52 During Data Transfer Sdio Fixed Internal MapCard Common Control Registers Cccr Common I/O Area CIAType Card Common Control Registers CccrCCCR/SDIO IOE3To abort transfers to/from memory Scsi 4BLS Transaction of function 0 CIA Empc Cccr bit DefinitionsAddress Function Basic Registers FBRFunction Basic Information Registers FBR Field TypeFBR bit and field definitions Sdio Simplified Specification Version Field TypeCard Information Structure CIS Setting Block Size with CMD53Multiple Function Sdio Cards Card Information Structure CIS and reserved area of CIAState Diagram for Bus State Machine Bus State DiagramCSA Data Format CSA AccessEmbedded I/O Code Storage Area CSA Interrupt Timing Sdio InterruptsInterrupt Clear Timing Terminated Data Transfer Interrupt CycleSdio Suspend/Resume Operation Sdio Read Wait Operation Power Control Overview Power ControlPower Control support for Sdio Cards Master Power ControlPower Selection Power Control Support for the Sdio HostHigh-Power Tuples Reference Tuples by Master Power Control and Power SelectPower Control Operation Switching Bus Speed Mode in a Combo Card High-Speed ModeSdio High-Speed Mode Sdio Physical Properties Sdio PowerSdio Simplified Specification Version Inrush Current Limiting CIS Reference Document CIS FormatsBasic Tuple Format and Tuple Chain Structure Byte Order Within TuplesSdio Card Metaformat Tuple VersionTuples Supported by Sdio Cards Code Name DescriptionSdio Specific Extensions Cistplmanfid Manufacturer Identification String TupleCistplmanfid Manufacturer Identification Tuple Cistplfuncid Function Identification TupleCistplfunce Tuple General Structure Cistplfunce Function Extension TupleCistplfunce Tuple for Function 0 common Tplfidfunction Tuple for Function 0 commonByte Cistplfunce Tuple for FunctionTplfidfunction Tuple for Function Sdio Simplified Specification Version 10 Tplfefunctioninfo Definition Tplfidfunction Field Descriptions for Functions11 Tplfecsaproperty Definition Bit Name12 Cistplsdiostd Tuple Reserved for Sdio Cards Cistplsdiostd Function is a Standard Sdio FunctionCistplsdioext Tuple Reserved for Sdio Cards 13 Cistplsdioext Tuple Reserved for Sdio CardsNormative SD and SPI Command ListTable A-14 SD Mode Command List Sdmem Sdio Table A-15 SPI Mode Command ListNormative References Appendix BAbbreviations and Terms Appendix CLOW, High Informative