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4.9MMCNumberofBlocksRegister(MMCNBLK)
4.10MMCNumberofBlocksCounterRegister(MMCNBLC)
Registers
TheMMCnumberofblocksregister(MMCNBLK)specifiesthenumberofblocksforamultiple-block
transfer.
TheMMCnumberofblocksregister(MMCNBLK)isshowninFigure26anddescribedinTable14.
Figure26.MMCNumberofBlocksRegister(MMCNBLK)
3116
Reserved
R-0
150
NBLK
R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table14.MMCNumberofBlocksRegister(MMCNBLK)FieldDescriptions
BitFieldValueDescription
31-16Reserved0Reserved
15-0NBLK0-FFFFhNumberofblocks.Thisfieldisusedtosetthetotalnumberofblockstobetransferred.
0Infinitenumberofblocks.TheMMCcontrollerreads/writesblocksofdatauntila
STOP_TRANSMISSIONcommandiswrittentotheMMCcommandregister(MMCCMD).
1h–FFFFhnblocks.TheMMCcontrollerreads/writesonlynblocksofdata,evenifthe
STOP_TRANSMISSIONcommandhasnotbeenwrittentotheMMCcommandregister
(MMCCMD).
TheMMCnumberofblockscounterregister(MMCNBLC)isadown-counterfortrackingthenumberof
blocksremainingtobetransferredduringamultiple-blocktransfer.
TheMMCnumberofblockscounterregister(MMCNBLC)isshowninFigure27anddescribedin
Table15.
Figure27.MMCNumberofBlocksCounterRegister(MMCNBLC)
3116
Reserved
R-0
150
NBLC
R-FFFFh
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table15.MMCNumberofBlocksCounterRegister(MMCNBLC)FieldDescriptions
BitFieldValueDescription
31-16Reserved0Reserved
15-0NBLC0–FFFFhReadthisfieldtodeterminethenumberofblocksremainingtobetransferred.
MultimediaCard(MMC)/SecureDigital(SD)CardController 50SPRUE30B–September2006
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