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4.6MMCResponseTime-OutRegister(MMCTOR)
Registers
Table10.MMCInterruptMaskRegister(MMCIM)FieldDescriptions(continued)
BitFieldValueDescription
3ETOUTRDRead-datatime-outevent(TOUTRD)interruptenable.
0Read-datatime-outeventinterruptisdisabled.
1Read-datatime-outeventinterruptisenabled.
2ERSPDNECommand/responsedone(RSPDNE)interruptenable.
0Command/responsedoneinterruptisdisabled.
1Command/responsedoneinterruptisenabled.
1EBSYDNEBusydone(BSYDNE)interruptenable.
0Busydoneinterruptisdisabled.
1Busydoneinterruptisenabled.
0EDATDNEDatadone(DATDNE)interruptenable.
0Datadoneinterruptisdisabled.
1Datadoneinterruptisenabled.
TheMMCresponsetime-outregister(MMCTOR)defineshowlongtheMMCcontrollerwaitsfora
responsefromamemorycardbeforerecordingatime-outconditionintheTOUTRSbitoftheMMCstatus
register0(MMCST0).IfthecorrespondingETOUTRSbitintheMMCinterruptmaskregister(MMCIM)is
set,aninterruptisgeneratedwhentheTOUTRSbitissetinMMCST0.Ifamemorycardshouldrequirea
longertime-outperiodthanMMCTORcanprovide,asoftwaretime-outmechanismcanbeimplemented.
TheMMCresponsetime-outregister(MMCTOR)isshowninFigure23anddescribedinTable11.
Figure23.MMCResponseTime-OutRegister(MMCTOR)
3116
Reserved
R-0
151312870
ReservedTOD_20_16TOR
R-0R/W-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table11.MMCResponseTime-OutRegister(MMCTOR)FieldDescriptions
BitFieldValueDescription
31-13Reserved0Reserved
12-8TOD_20_160-1FhDatareadtime-outcountupper5bits.UsedinconjunctionwiththeTOD_15_0bitsinMMCTODto
forma21-bitcount.SeeMMCTOD(Section4.7).
7-0TOR0-FFhTime-outcountforresponse.
0Notimeout
1-FFh1CLKclockcycleto255CLKclockcycles
SPRUE30B–September2006MultimediaCard(MMC)/SecureDigital(SD)CardController47
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