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4.39ReceiveCPPIDMAStateWord2(RCPPIDMASTATEW2)
4.40ReceiveCPPIDMAStateWord3(RCPPIDMASTATEW3)
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Registers
TheReceiveCPPIDMAStateWord2(RCPPIDMASTATEW2)isshowninFigure54anddescribedin
Table55.
Figure54.ReceiveCPPIDMAStateWord2(RCPPIDMASTATEW2)
3116
SOP_DESCRIPTOR_PTR
R/W-0
15210
SOP_DESCRIPTOR_PTRReservedIN_PACKET
R/W-0R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table55.ReceiveCPPIDMAStateWord2(RCPPIDMASTATEW2)FieldDescriptions
BitFieldValueDescription
31-2SOP_DESCRIPTOR_PTR0-1FFFFFFFhStartofPacketBufferDescriptorPointer
30-bitpointerto32-bitaligneddescriptorwhichisthefirstdescriptorforthe
currentpacket
1Reserved0Reserved
0IN_PACKETFlagindicatingtheDMAisinthemiddleofprocessingapacket0:Notcurrently
inpacket
0Notcurrentlyinpacket
1Currentlyinpacket
TheReceiveCPPIDMAStateWord3(RCPPIDMASTATEW3)isshowninFigure55anddescribedin
Table56.
Figure55.ReceiveCPPIDMAStateWord3(RCPPIDMASTATEW3)
3116
CURR_DESCRIPTOR_PTR
R/W-0
1510
CURR_DESCRIPTOR_PTRReserved
R/W-0R-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table56.ReceiveCPPIDMAStateWord3(RCPPIDMASTATEW3)FieldDescriptions
BitFieldValueDescription
31-2CURR_DESCRIPTOR_PTR0-3FFFFFFFhCurrentBufferDescriptorPointer
30-bitpointerto32-bitaligneddescriptorforbufferintowhichdataiscurrently
beingreceived
1-0Reserved0Reserved
SPRUGH3–November2008UniversalSerialBus(USB)Controller107
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