Enabling CRC in SPI Combo Card | SDI Technologies SDIO Card specs

©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

Figure 3-9 shows the equivalent command flow to re-initialize the memory controller of a Combo card. The RCA value of xxxxh denotes an RCA value of either 0x0000 or the prior RCA value. For new controller designs, a reset value of 0x0000 is recommended. The important fact for the host designer to note is that the host shall not issue any commands except for CMD0, ACMD41 (with RCA=0x0000), CMD2, CMD3 or CMD7 to the Combo Card until the memory controller has transitioned to the tran state.

3.4.5Enabling CRC in SPI Combo Card

When receiving CMD59, Combo cards shall synchronize CRC enable in both SDIO and memory portions of the card. If a host enables CRC using CMD59 and subsequently re-initializes either the I/O or memory controller, the CRC for that controller will be off by default and the host shall issue a CMD59 to re-enable CRC. When CMD59 is received, Combo Cards return the R1 response token while SDIO only cards return the modified R1 response token.

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SDI Technologies SDIO Card manual Enabling CRC in SPI Combo Card

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 Standard Sdio Functions Sdio FeaturesGeneral Description Primary Reference Document Sdio Host Modes Sdio Signaling DefinitionSdio Card Types Sdio Card modes Signal connection to two 4-bit Sdio cards Signal Pins Differences 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 OCR bit Iosendopcond Command CMD5VDD Voltage Window Position OCR Values for CMD5 Iosendopcond Response R4 Response R4 in SD mode Re-initialize both I/O and Memory Acceptable Commands after InitializationRecommendations for RCA after Reset Special Initialization considerations for Combo Cards Re-Initialization Flow for Memory controller Re-Initialization Flow for I/O Controller Enabling 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 States Card Detect ResistorTimings Combo Card 4-bit Control Read Abort Data Transfer Block SizesData Transfer Abort Changes to SD Memory Fixed Registers RCA Register OCR RegisterCID Register CSD Register Bit Identifier Type Value Description Sdio Status Register StructureClear Iorwdirect Command CMD52 New I/O Read/Write Commands 1 CMD52 Response SD modes ComcrcerrorIllegalcommand Iorwdirect Response R5 TRN=Transfer DIS=DisabledIdentifier Type Value Description Clear Condition CMD=DAT lines free CRC Iorwextended Command CMD53Iorw Extended command Op Code Definition OP code Command operation 1 CMD53 Data Transfer Format Byte Count Values Interrupts Register Access TimeSdio Card Internal Operation Overview Sdio Fixed Internal Map Suspend/ResumeRead Wait CMD52 During Data Transfer Card Common Control Registers Cccr Common I/O Area CIA IOE3 Card Common Control Registers CccrType CCCR/SDIO To abort transfers to/from memory Scsi 4BLS Transaction of function 0 CIA Empc Cccr bit Definitions Field Type Function Basic Registers FBRAddress Function Basic Information Registers FBR FBR bit and field definitions Sdio Simplified Specification Version Field Type Card Information Structure CIS and reserved area of CIA Setting Block Size with CMD53Card Information Structure CIS Multiple Function Sdio Cards State Diagram for Bus State Machine Bus State Diagram CSA Data Format CSA AccessEmbedded I/O Code Storage Area CSA Interrupt Timing Sdio Interrupts Interrupt Clear Timing Terminated Data Transfer Interrupt Cycle Sdio Suspend/Resume Operation Sdio Read Wait Operation Master Power Control Power ControlPower Control Overview Power Control support for Sdio Cards Reference Tuples by Master Power Control and Power Select Power Control Support for the Sdio HostPower Selection High-Power Tuples Power Control Operation Switching Bus Speed Mode in a Combo Card High-Speed ModeSdio High-Speed Mode Sdio Physical Properties Sdio Power Sdio Simplified Specification Version Inrush Current Limiting Byte Order Within Tuples CIS FormatsCIS Reference Document Basic Tuple Format and Tuple Chain Structure Code Name Description Tuple VersionSdio Card Metaformat Tuples Supported by Sdio Cards Cistplfuncid Function Identification Tuple Cistplmanfid Manufacturer Identification String TupleSdio Specific Extensions Cistplmanfid Manufacturer Identification Tuple Tplfidfunction Tuple for Function 0 common Cistplfunce Function Extension TupleCistplfunce Tuple General Structure Cistplfunce Tuple for Function 0 common Byte Cistplfunce Tuple for FunctionTplfidfunction Tuple for Function Sdio Simplified Specification Version Bit Name Tplfidfunction Field Descriptions for Functions10 Tplfefunctioninfo Definition 11 Tplfecsaproperty Definition 13 Cistplsdioext Tuple Reserved for Sdio Cards Cistplsdiostd Function is a Standard Sdio Function12 Cistplsdiostd Tuple Reserved for Sdio Cards Cistplsdioext Tuple Reserved for Sdio Cards Normative SD and SPI Command ListTable A-14 SD Mode Command List Sdmem Sdio Table A-15 SPI Mode Command List Normative References Appendix B Abbreviations and Terms Appendix C LOW, High Informative