SDI Technologies SDIO Card Iorwextended Command CMD53, Iorw Extended command Op Code Definition

Page 33

©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

5.3IO_RW_EXTENDED Command (CMD53)

In order to read and write multiple I/O registers with a single command, a new command, IO_RW_EXTENDED is defined. This command is included in command class 9 (I/O Commands). This command allows the reading or writing of a large number of I/O registers with a single command. Since this is a data transfer command, it provides the highest possible transfer rate.

S

D

Command

Index

110101b

R/W

flag

Function Number

Block Mode

OP

Code

Register Address

Byte/Block

Count

CRC

7

E

1

1

6

1

3

1

1

17

9

7

1

Figure 5-4 IO_RW_EXTENDED Command

The IO_RW_EXTENDED Command contains the following fields:

S(tart bit):

Start bit. Always 0

D(irection):

Direction. Always1 indicates transfer host to card.

Command Index:

Identifies the “IO_RW_EXTENDED” command with a value of 110101b

R/W Flag:

This bit determines the direction of the I/O operation. If this bit is 0, this command

 

reads data from the SDIO card at the address specified by the Function Number and

 

the Register Address to the host. The read data shall be returned on the DAT[x]

 

lines. If this bit is set to 1, the command shall write the bytes from the DAT[x] lines to

 

the I/O location addressed by the Function Number and the Register Address.

Function Number:

The number of the function within the I/O card you wish to read or write. Note that

 

function 0x00 selects the common I/O area (CIA).

Block Mode

(Optional) this bit, if set to 1, indicates that the read or write operation shall be

 

performed on a block basis, rather than the normal byte basis. If this bit is set, the

 

Byte/Block count value shall contain the number of blocks to be read/written. The

 

block size for functions 1-7 is set by writing the block size to the I/O block size

 

register in the FBR (See Table 6-3 and Table 6-4). The block size for function 0 is set

 

by writing to the FN0 Block Size register in the CCCR. Card and host support of the

 

block I/O mode is optional. The host can determine if a card supports block I/O by

 

reading the Card supports MBIO bit (SMB) in the CCCR (see Table 6-2). The block

 

size used when Block Mode = 1 and the maximum byte count per command used

 

when Block Mode = 0 can be read from the CIS in the tuple

 

 

TPLFE_MAX_BLK_SIZE (see 16.7.4) on a per-function basis.

OP code

Defines the read/write operation as described in Table 5-2

 

 

 

 

 

 

 

 

OP code

Command operation

 

 

0Multi byte R/W to fixed address

1Multi byte R/W to incrementing address

Table 5-2 IO_RW_ EXTENDED command Op Code Definition

•OP Code 0 is used to read or write multiple bytes of data to/from a single I/O register address. This command is useful when I/O data is transferred using a FIFO inside of the I/O card. In this case, multiple bytes of data are transferred to/from a single register address. For this operation, the address of the register is set into the Register Address field. Data is transferred on the DAT[0] or DAT[3:0] lines as defined for SD memory cards.

•OP Code 1 is used to read or write multiple bytes of data to/from an I/O register

24

Page 32 Page 34
Image 33
Page 32 Page 34
Contents SD Specifications Part E1 Sdio Simplified Specification Sdio Simplified Specification Version Changes compared to previous issueDate 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 FunctionsSdio Card Types Sdio Signaling DefinitionSdio Card modes Sdio Host ModesSignal connection to two 4-bit Sdio cards Signal PinsReset Sdio Card InitializationDifferences 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 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 Differences with SD Memory Specification Sdio Command ListUnsupported SD Memory Commands Reset for Sdio Modified R6 ResponseBus Width 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 RegisterSdio Status Register Structure ClearBit Identifier Type Value Description 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 Access Embedded I/O Code Storage Area CSACSA Data Format 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 High-Speed Mode Sdio High-Speed ModeSwitching Bus Speed Mode in a Combo Card 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 commonCistplfunce Tuple for Function Tplfidfunction Tuple for FunctionByte 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 CardsSD and SPI Command List Table A-14 SD Mode Command ListNormative Sdmem Sdio Table A-15 SPI Mode Command ListNormative References Appendix BAbbreviations and Terms Appendix CLOW, High Informative
Top Page Image Contents