Common I/O Area CIA | SDI Technologies SDIO Card specification

©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

CIA (Function 0)

0x000000-0x0000FF	CCCR
0x000100-0x0001FF	FBR (Function 1)	Window
0x000200-0x0002FF	FBR (Function 2)	Window
0x000300-0x0003FF	FBR (Function 3)	Window
0x000700-0x0007FF	FBR (Function 7)	Window
0x000800-0x000FFF	RFU
0x001000-0x017FFF	CIS Area
0x001000-0x017FFF	(common and per-function)
0x018000-0x01FFFF	RFU	CIS Pointers
0x018000-0x01FFFF	RFU
	128K Register Space
	(function 1-7)

16 MB optional Code Storage Area

(CSA)

0x000000-0x01FFFF

Function Unique

Figure 6-1 SDIO Internal Map

6.8Common I/O Area (CIA)

The Common I/O Area (CIA) shall be implemented on all SDIO cards. The CIA is accessed by the host via I/O reads and writes to function 0. The registers within the CIA are provided to enable/disable the operation of the I/O function(s), control the generation of interrupts and optionally load software to support the I/O functions. The registers in the CIA also provide information about the function(s) abilities and requirements. There are three distinct register structures supported within the CIA. They are:

1.Card Common Control Registers (CCCR)

2.Function Basic Registers (FBR)

3.Card Information Structure (CIS)

6.9Card Common Control Registers (CCCR)

The Card Common Control Registers allow for quick host checking and control of an I/O card’s enable and interrupts on a per card (master) and per function basis. The bits in the CCCR are mixed Read/Write and read only. If any of the possible 7 functions are not provided on an SDIO card, the bits corresponding to unused functions shall all be read-only and read as 0. All reserved for future use bits (RFU) shall be read-only and return a value of 0. All writeable bits are set to 0 after power-up or reset. Access to the CCCR is possible even after initialization when the I/O functions are disabled. Access is performed using the I/O read and write commands defined in section 5. This allows the host to enable functions after initialization. The CCCR is organized as follows:

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SDI Technologies SDIO Card manual Common I/O Area CIA, Card Common Control Registers Cccr

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 General Description Sdio FeaturesPrimary Reference Document Standard Sdio Functions Sdio Card Types Sdio Signaling DefinitionSdio Card modes Sdio Host Modes Signal connection to two 4-bit Sdio cards Signal Pins Sdio 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 VDD Voltage Window Position Iosendopcond Command CMD5OCR Values for CMD5 OCR bit Iosendopcond Response R4 Response R4 in SD mode Recommendations for RCA after Reset Acceptable Commands after InitializationSpecial Initialization considerations for Combo Cards Re-initialize both I/O and Memory Re-Initialization Flow for Memory controller Re-Initialization Flow for I/O Controller Enabling CRC in SPI Combo Card Sdio Command List Differences with SD Memory SpecificationUnsupported SD Memory Commands Modified R6 Response Reset for SdioBus Width Timings Card Detect ResistorCombo Card 4-bit Control Card Detect Resistor States Data Transfer Abort Data Transfer Block SizesChanges to SD Memory Fixed Registers Read Abort CID Register OCR RegisterCSD Register RCA Register Clear Sdio Status Register StructureBit Identifier Type Value Description Iorwdirect Command CMD52 New I/O Read/Write Commands Illegalcommand ComcrcerrorIorwdirect Response R5 1 CMD52 Response SD modes Identifier Type Value Description Clear Condition DIS=DisabledCMD=DAT lines free TRN=Transfer Iorw Extended command Op Code Definition Iorwextended Command CMD53OP code Command operation CRC 1 CMD53 Data Transfer Format Byte Count Values Sdio Card Internal Operation Register Access TimeOverview Interrupts Read Wait Suspend/ResumeCMD52 During Data Transfer Sdio Fixed Internal Map Card Common Control Registers Cccr Common I/O Area CIA Type Card Common Control Registers CccrCCCR/SDIO IOE3 To abort transfers to/from memory Scsi 4BLS Transaction of function 0 CIA Empc Cccr bit Definitions Address Function Basic Registers FBRFunction Basic Information Registers FBR Field Type FBR bit and field definitions Sdio Simplified Specification Version Field Type Card Information Structure CIS Setting Block Size with CMD53Multiple Function Sdio Cards Card Information Structure CIS and reserved area of CIA State Diagram for Bus State Machine Bus State Diagram Embedded I/O Code Storage Area CSA CSA AccessCSA Data Format Interrupt Timing Sdio Interrupts Interrupt Clear Timing Terminated Data Transfer Interrupt Cycle Sdio Suspend/Resume Operation Sdio Read Wait Operation Power Control Overview Power ControlPower Control support for Sdio Cards Master Power Control Power Selection Power Control Support for the Sdio HostHigh-Power Tuples Reference Tuples by Master Power Control and Power Select Power Control Operation Sdio High-Speed Mode High-Speed ModeSwitching Bus Speed Mode in a Combo Card Sdio Physical Properties Sdio Power Sdio Simplified Specification Version Inrush Current Limiting CIS Reference Document CIS FormatsBasic Tuple Format and Tuple Chain Structure Byte Order Within Tuples Sdio Card Metaformat Tuple VersionTuples Supported by Sdio Cards Code Name Description Sdio Specific Extensions Cistplmanfid Manufacturer Identification String TupleCistplmanfid Manufacturer Identification Tuple Cistplfuncid Function Identification Tuple Cistplfunce Tuple General Structure Cistplfunce Function Extension TupleCistplfunce Tuple for Function 0 common Tplfidfunction Tuple for Function 0 common Tplfidfunction Tuple for Function Cistplfunce Tuple for FunctionByte Sdio Simplified Specification Version 10 Tplfefunctioninfo Definition Tplfidfunction Field Descriptions for Functions11 Tplfecsaproperty Definition Bit Name 12 Cistplsdiostd Tuple Reserved for Sdio Cards Cistplsdiostd Function is a Standard Sdio FunctionCistplsdioext Tuple Reserved for Sdio Cards 13 Cistplsdioext Tuple Reserved for Sdio Cards Table A-14 SD Mode Command List SD and SPI Command ListNormative Sdmem Sdio Table A-15 SPI Mode Command List Normative References Appendix B Abbreviations and Terms Appendix C LOW, High Informative