SDI Technologies SDIO Card manual Re-Initialization Flow for I/O Controller

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©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

The card clears RCA to 0x0000

The card keeps current RCA value

Command Sequence

Card RCA Select/Deselect Mem State I/O State

Combo Init

(After CMD7 with the correct RCA)

Issue CMD52 (Reset I/O)

Re-initialize I/O (CMD5)

Issue CMD3

Issue CMD7 with the correct RCA

(and Data Transfer)

RCA1		Select		tran	cmd
RCA1	xxxx	Sel	Desel	tran	cmd	idle
xxxx		Deselect		tran	idle
xxxx	RCA2	Deselect		tran	idle	stby
RCA2		Desel	Sel	tran	stby	cmd

Figure 3-8 Re-Initialization Flow for I/O Controller

Figure 3-8 shows the re-initialization flow for the I/O controller of a Combo card. The flow of commands on the left side is matched with the RCA and controller states on the right side. The RCA value of xxxx denotes an RCA value of either 0x0000 or the prior RCA value. For new controller designs, a reset RCA value of 0x0000 is recommended. The host shall not issue any commands to the Combo Card except for CMD0, CMD5, CMD3 or CMD7 until the I/O controller has transitioned to the cmd state.

Command Sequence

Card RCA Select/Deselect Mem State I/O State

Combo Init

(After CMD7 with the correct RCA)

Issue CMD0 (Reset Memory)

Re-initialize Memory (ACMD41)

Issue CMD2

Issue CMD3)

Issue CMD7 with the correct RCA

(and Data Transfer)

RCA1		Select		tran		cmd
RCA1	xxxxh	Sel	Desel	tran	idle	cmd
xxxxh		Deselect		idle	ready	cmd
xxxxh		Deselect		ready	ident	cmd
xxxxh	RCA2	Deselect		ident	stby	cmd
RCA2		Desel	Sel	stby	tran	cmd

Figure 3-9 Re-Initialization Flow for Memory controller

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Contents SD Specifications Part E1 Sdio Simplified Specification Changes compared to previous issue Sdio Simplified Specification VersionDate Version 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 Primary Reference Document Sdio FeaturesGeneral Description Standard Sdio FunctionsSdio Card modes Sdio Signaling DefinitionSdio Card Types Sdio Host ModesSignal Pins Signal connection to two 4-bit Sdio cardsSdio Card Initialization ResetDifferences in I/O 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 OCR Values for CMD5 Iosendopcond Command CMD5VDD Voltage Window Position OCR bitResponse R4 in SD mode Iosendopcond Response R4Special Initialization considerations for Combo Cards Acceptable Commands after InitializationRecommendations for RCA after Reset Re-initialize both I/O and MemoryRe-Initialization Flow for I/O Controller Re-Initialization Flow for Memory controllerEnabling CRC in SPI Combo Card Sdio Command List Differences with SD Memory SpecificationUnsupported SD Memory Commands Modified R6 Response Reset for SdioBus Width Combo Card 4-bit Control Card Detect ResistorTimings Card Detect Resistor StatesChanges to SD Memory Fixed Registers Data Transfer Block SizesData Transfer Abort Read AbortCSD Register OCR RegisterCID Register RCA RegisterClear Sdio Status Register StructureBit Identifier Type Value Description New I/O Read/Write Commands Iorwdirect Command CMD52Iorwdirect Response R5 ComcrcerrorIllegalcommand 1 CMD52 Response SD modesCMD=DAT lines free DIS=DisabledIdentifier Type Value Description Clear Condition TRN=TransferOP code Command operation Iorwextended Command CMD53Iorw Extended command Op Code Definition CRCByte Count Values 1 CMD53 Data Transfer FormatOverview Register Access TimeSdio Card Internal Operation InterruptsCMD52 During Data Transfer Suspend/ResumeRead Wait Sdio Fixed Internal MapCommon I/O Area CIA Card Common Control Registers CccrCCCR/SDIO Card Common Control Registers CccrType IOE3To abort transfers to/from memory Scsi 4BLS Transaction of function 0 CIA Cccr bit Definitions EmpcFunction Basic Information Registers FBR Function Basic Registers FBRAddress Field TypeSdio Simplified Specification Version Field Type FBR bit and field definitionsMultiple Function Sdio Cards Setting Block Size with CMD53Card Information Structure CIS Card Information Structure CIS and reserved area of CIABus State Diagram State Diagram for Bus State MachineEmbedded I/O Code Storage Area CSA CSA AccessCSA Data Format Sdio Interrupts Interrupt TimingTerminated Data Transfer Interrupt Cycle Interrupt Clear TimingSdio Suspend/Resume Operation Sdio Read Wait Operation Power Control support for Sdio Cards Power ControlPower Control Overview Master Power ControlHigh-Power Tuples Power Control Support for the Sdio HostPower Selection Reference Tuples by Master Power Control and Power SelectPower Control Operation Sdio High-Speed Mode High-Speed ModeSwitching Bus Speed Mode in a Combo Card Sdio Power Sdio Physical PropertiesSdio Simplified Specification Version Inrush Current Limiting Basic Tuple Format and Tuple Chain Structure CIS FormatsCIS Reference Document Byte Order Within TuplesTuples Supported by Sdio Cards Tuple VersionSdio Card Metaformat Code Name DescriptionCistplmanfid Manufacturer Identification Tuple Cistplmanfid Manufacturer Identification String TupleSdio Specific Extensions Cistplfuncid Function Identification TupleCistplfunce Tuple for Function 0 common Cistplfunce Function Extension TupleCistplfunce Tuple General Structure Tplfidfunction Tuple for Function 0 commonTplfidfunction Tuple for Function Cistplfunce Tuple for FunctionByte Sdio Simplified Specification Version 11 Tplfecsaproperty Definition Tplfidfunction Field Descriptions for Functions10 Tplfefunctioninfo Definition Bit NameCistplsdioext Tuple Reserved for Sdio Cards Cistplsdiostd Function is a Standard Sdio Function12 Cistplsdiostd Tuple Reserved for Sdio Cards 13 Cistplsdioext Tuple Reserved for Sdio CardsTable A-14 SD Mode Command List SD and SPI Command ListNormative Table A-15 SPI Mode Command List Sdmem SdioAppendix B Normative ReferencesAppendix C Abbreviations and TermsLOW, High Informative