SDI Technologies SDIO Card manual Iosendopcond Response R4, Response R4 in SD mode

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©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

3.3The IO_SEND_OP_COND Response (R4)

An SDIO card receiving CMD5 shall respond with a SDIO unique response, R4. The format of R4 for both the SD and SPI modes is:

S

D

Reserved

C

Number Memory

of I/O Present functions

Stuff

Bits

I/O OCR

Reserved

E

1

1

6

1

3

1

3

24

7

1

Figure 3-5 Response R4 in SD mode

Modified

R1

C

Number Memory

of I/O Present functions

Stuff Bits

I/O OCR

8

1

3

1

3

24

Figure 3-6 Response R4 in SPI mode

The Response, R4 contains the following data:

S(tart bit):

Start bit. Always 0

D(irection):

Direction. Always 0. Indicates transfer from card to host.

Reserved:

Bits reserved for future use. These bits shall be set to 1.

C:

Set to 1 if Card is ready to operate after initialization

I/O OCR:

Operation Conditions Register. The supported minimum and maximum values

for VDD. The layout of the OCR is shown in Table 3-1. See section 4.10.1 for

additional information.

Memory Present:

Set to 1 if the card also contains SD memory. Set to 0 if the card is I/O only.

Number of I/O Functions:

Indicates the total number of I/O functions supported by this card. The range is 0-7.

Note that the common area present on all I/O cards at Function 0 is not included in

this count. The I/O functions shall be implemented sequentially beginning at

function 1.

Modified R1:

The SPI R1 response byte as described in the SD Physical Specification modified

for I/O as follows:

0

0

0

1 = in idle state

RFU (always 0)

1 = illegal command

1 = COM CRC error

1 = Function number error

RFU (always 0)

1 = parameter error

Start Bit (always 0)

Figure 3-7 Modified R1 Response

Stuff Bits:

Not used, shall be set to 0.

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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 Sdio Features General DescriptionPrimary Reference Document Standard Sdio FunctionsSdio Signaling Definition Sdio Card TypesSdio Card modes Sdio Host ModesSignal Pins Signal connection to two 4-bit Sdio cardsDifferences 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 Iosendopcond Command CMD5 VDD Voltage Window PositionOCR Values for CMD5 OCR bitResponse R4 in SD mode Iosendopcond Response R4Acceptable Commands after Initialization Recommendations for RCA after ResetSpecial Initialization considerations for Combo Cards Re-initialize both I/O and MemoryRe-Initialization Flow for I/O Controller Re-Initialization Flow for Memory controllerEnabling CRC in SPI Combo Card Unsupported SD Memory Commands Differences with SD Memory SpecificationSdio Command List Bus Width Reset for SdioModified R6 Response Card Detect Resistor TimingsCombo Card 4-bit Control Card Detect Resistor StatesData Transfer Block Sizes Data Transfer AbortChanges to SD Memory Fixed Registers Read AbortOCR Register CID RegisterCSD Register RCA RegisterBit Identifier Type Value Description Sdio Status Register StructureClear New I/O Read/Write Commands Iorwdirect Command CMD52Comcrcerror IllegalcommandIorwdirect Response R5 1 CMD52 Response SD modesDIS=Disabled Identifier Type Value Description Clear ConditionCMD=DAT lines free TRN=TransferIorwextended Command CMD53 Iorw Extended command Op Code DefinitionOP code Command operation CRCByte Count Values 1 CMD53 Data Transfer FormatRegister Access Time Sdio Card Internal OperationOverview InterruptsSuspend/Resume Read WaitCMD52 During Data Transfer Sdio Fixed Internal MapCommon I/O Area CIA Card Common Control Registers CccrCard Common Control Registers Cccr TypeCCCR/SDIO IOE3To abort transfers to/from memory Scsi 4BLS Transaction of function 0 CIA Cccr bit Definitions EmpcFunction Basic Registers FBR AddressFunction Basic Information Registers FBR Field TypeSdio Simplified Specification Version Field Type FBR bit and field definitionsSetting Block Size with CMD53 Card Information Structure CISMultiple Function Sdio Cards Card Information Structure CIS and reserved area of CIABus State Diagram State Diagram for Bus State MachineCSA Data Format CSA AccessEmbedded I/O Code Storage Area CSA Sdio Interrupts Interrupt TimingTerminated Data Transfer Interrupt Cycle Interrupt Clear TimingSdio Suspend/Resume Operation Sdio Read Wait Operation Power Control Power Control OverviewPower Control support for Sdio Cards Master Power ControlPower Control Support for the Sdio Host Power SelectionHigh-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 Power Sdio Physical PropertiesSdio Simplified Specification Version Inrush Current Limiting CIS Formats CIS Reference DocumentBasic Tuple Format and Tuple Chain Structure Byte Order Within TuplesTuple Version Sdio Card MetaformatTuples Supported by Sdio Cards Code Name DescriptionCistplmanfid Manufacturer Identification String Tuple Sdio Specific ExtensionsCistplmanfid Manufacturer Identification Tuple Cistplfuncid Function Identification TupleCistplfunce Function Extension Tuple Cistplfunce Tuple General StructureCistplfunce Tuple for Function 0 common Tplfidfunction Tuple for Function 0 commonByte Cistplfunce Tuple for FunctionTplfidfunction Tuple for Function Sdio Simplified Specification Version Tplfidfunction Field Descriptions for Functions 10 Tplfefunctioninfo Definition11 Tplfecsaproperty Definition Bit NameCistplsdiostd Function is a Standard Sdio Function 12 Cistplsdiostd Tuple Reserved for Sdio CardsCistplsdioext Tuple Reserved for Sdio Cards 13 Cistplsdioext Tuple Reserved for Sdio CardsNormative SD and SPI Command ListTable A-14 SD Mode Command List Table A-15 SPI Mode Command List Sdmem SdioAppendix B Normative ReferencesAppendix C Abbreviations and TermsLOW, High Informative