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4.11MMCDataReceiveRegister(MMCDRR)
4.12MMCDataTransmitRegister(MMCDXR)
Registers
TheMMCdatareceiveregister(MMCDRR)isusedforstoringthereceiveddatafromtheMMCcontroller.
TheCPUortheDMAcontrollercanreaddatafromthisregister.MMCDRRexpectsthedatain
little-endianformat.
TheMMCdatareceiveregister(MMCDRR)isshowninFigure28anddescribedinTable16.
Figure28.MMCDataReceiveRegister(MMCDRR)
310
DRR
R/W-0
LEGEND:R/W=Read/Write;-n=valueafterreset
Table16.MMCDataReceiveRegister(MMCDRR)FieldDescriptions
BitFieldValueDescription
31-0DRR0-FFFFFFFFhDatareceive.
TheMMCdatatransmitregister(MMCDXR)isusedforstoringthedatatobetransmittedfromtheMMC
controllertothememorycard.TheCPUortheDMAcontrollercanwritedatatothisregistertobe
transmitted.MMCDXRexpectsthedatainlittle-endianformat.
TheMMCdatatransmitregister(MMCDXR)isshowninFigure29anddescribedinTable17.
Figure29.MMCDataTransmitRegister(MMCDXR)
310
DXR
R/W-0
LEGEND:R/W=Read/Write;-n=valueafterreset
Table17.MMCDataTransmitRegister(MMCDXR)FieldDescriptions
BitFieldValueDescription
31-0DXR0-FFFFFFFFhDatatransmit.
SPRUE30B–September2006MultimediaCard(MMC)/SecureDigital(SD)CardController51
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