SDI Technologies SDIO Card manual Cccr bit Definitions, Empc

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©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

Field

Type

Description

SMPC

R/O

Support Master Power Control These bits tell the host if the card supports Master

 

 

Power Control.

 

 

SMPC=0 : The total card current is less than 200mA, even if all functions

 

 

are active (IOEx=1). EMPC,SPS and EPS shall be zero.

 

 

SMPC=1 :The total card current may exceed 200mA.

 

 

EMPC, SPS and EPS are available.

EMPC

R/W

Enable Master Power Control

 

 

EMPC=0(default): The total card current shall be less than 200mA.

 

 

The card automatically switches the mode of function(s) to lower current or does not

 

 

allow some functions to become enabled, regardless of the value of EPS, so that total

 

 

card current is 200mA or less. (The card manufacturer determines which functions

 

 

operate and their modes to guarantee this limit.)

 

 

EMPC=1: The total card current may exceed 200mA and SPS and EPS are available.

 

 

The host uses SPS, EPS in FBR and IOEx to enable higher current function modes

 

 

based on the host’s ability to supply the necessary current.

SHS

R/O

Support High-Speed

 

 

This flag bit reports the card’s ability to operate in High-Speed mode

 

 

SHS=0: The card does not support High-Speed mode

 

 

SHS=1: The card supports High-Speed mode. The host enables High-Speed mode

 

 

via the EHS bit. See section 12 for details on switching between default and

 

 

High-Speed mode.

EHS

R/W

Enable High-Speed

 

 

EHS=0 (default): The card operates in default timing mode with a clock rate up to

 

 

25MHz.

 

 

EHS=1 : High-Speed Mode

 

 

The card operates in High-Speed timing mode with a clock rate up to 50MHz. See

 

 

section 12 for details on switching between default and High-Speed mode.

 

 

When SHS is set to 0, writing to this bit is ignored and always indicates 0.

RFU

R/O

Any bit defined as Reserved for Future Use (RFU) shall be read-only and shall be

 

 

read as 0.

Reserved

R/W

These 16 registers are reserved for the maker of the I/O card to be used for any

for Vendors

 

operations that are defined by and specific to any vendor unique operation.

 

 

Information about the use of these optional registers needs to be obtained from the

 

 

SDIO card maker. Reading and/or writing these registers without understanding the

 

 

vendor’s definitions may cause unexpected behavior or even damage to the card.

 

 

Table 6-2 CCCR bit Definitions

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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 Standard Sdio Functions Sdio FeaturesGeneral Description Primary Reference DocumentSdio Host Modes Sdio Signaling DefinitionSdio Card Types Sdio Card modesSignal connection to two 4-bit Sdio cards Signal PinsSdio 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 bit Iosendopcond Command CMD5VDD Voltage Window Position OCR Values for CMD5Iosendopcond Response R4 Response R4 in SD modeRe-initialize both I/O and Memory Acceptable Commands after InitializationRecommendations for RCA after Reset Special Initialization considerations for Combo CardsRe-Initialization Flow for Memory controller Re-Initialization Flow for I/O ControllerEnabling CRC in SPI Combo Card Sdio Command List Differences with SD Memory SpecificationUnsupported SD Memory Commands Modified R6 Response Reset for SdioBus Width Card Detect Resistor States Card Detect ResistorTimings Combo Card 4-bit ControlRead Abort Data Transfer Block SizesData Transfer Abort Changes to SD Memory Fixed RegistersRCA Register OCR RegisterCID Register CSD RegisterClear Sdio Status Register StructureBit Identifier Type Value Description Iorwdirect Command CMD52 New I/O Read/Write Commands1 CMD52 Response SD modes ComcrcerrorIllegalcommand Iorwdirect Response R5TRN=Transfer DIS=DisabledIdentifier Type Value Description Clear Condition CMD=DAT lines freeCRC Iorwextended Command CMD53Iorw Extended command Op Code Definition OP code Command operation1 CMD53 Data Transfer Format Byte Count ValuesInterrupts Register Access TimeSdio Card Internal Operation OverviewSdio Fixed Internal Map Suspend/ResumeRead Wait CMD52 During Data TransferCard Common Control Registers Cccr Common I/O Area CIAIOE3 Card Common Control Registers CccrType CCCR/SDIOTo abort transfers to/from memory Scsi 4BLS Transaction of function 0 CIA Empc Cccr bit DefinitionsField Type Function Basic Registers FBRAddress Function Basic Information Registers FBRFBR bit and field definitions Sdio Simplified Specification Version Field TypeCard Information Structure CIS and reserved area of CIA Setting Block Size with CMD53Card Information Structure CIS Multiple Function Sdio CardsState Diagram for Bus State Machine Bus State DiagramEmbedded I/O Code Storage Area CSA CSA AccessCSA Data Format Interrupt Timing Sdio InterruptsInterrupt Clear Timing Terminated Data Transfer Interrupt CycleSdio Suspend/Resume Operation Sdio Read Wait Operation Master Power Control Power ControlPower Control Overview Power Control support for Sdio CardsReference Tuples by Master Power Control and Power Select Power Control Support for the Sdio HostPower Selection High-Power TuplesPower Control Operation Sdio High-Speed Mode High-Speed ModeSwitching Bus Speed Mode in a Combo Card Sdio Physical Properties Sdio PowerSdio Simplified Specification Version Inrush Current Limiting Byte Order Within Tuples CIS FormatsCIS Reference Document Basic Tuple Format and Tuple Chain StructureCode Name Description Tuple VersionSdio Card Metaformat Tuples Supported by Sdio CardsCistplfuncid Function Identification Tuple Cistplmanfid Manufacturer Identification String TupleSdio Specific Extensions Cistplmanfid Manufacturer Identification TupleTplfidfunction Tuple for Function 0 common Cistplfunce Function Extension TupleCistplfunce Tuple General Structure Cistplfunce Tuple for Function 0 commonTplfidfunction Tuple for Function Cistplfunce Tuple for FunctionByte Sdio Simplified Specification Version Bit Name Tplfidfunction Field Descriptions for Functions10 Tplfefunctioninfo Definition 11 Tplfecsaproperty Definition13 Cistplsdioext Tuple Reserved for Sdio Cards Cistplsdiostd Function is a Standard Sdio Function12 Cistplsdiostd Tuple Reserved for Sdio Cards Cistplsdioext Tuple Reserved for Sdio CardsTable A-14 SD Mode Command List SD and SPI Command ListNormative Sdmem Sdio Table A-15 SPI Mode Command ListNormative References Appendix BAbbreviations and Terms Appendix CLOW, High Informative
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