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4.41ReceiveCPPIDMAStateWord4(RCPPIDMASTATEW4)
4.42ReceiveCPPIDMAStateWord5(RCPPIDMASTATEW5)
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Registers
TheReceiveCPPIDMAStateWord4(RCPPIDMASTATEW4)isshowninFigure56anddescribedin
Table57.
Figure56.ReceiveCPPIDMAStateWord4(RCPPIDMASTATEW4)
310
CURR_BUFFER_PTR
R/W-0
LEGEND:R/W=Read/Write;-n=valueafterreset
Table57.ReceiveCPPIDMAStateWord4(RCPPIDMASTATEW4)FieldDescriptions
BitFieldValueDescription
31-0CURR_BUFFER_PTR0-FFFFFFFFhCurrentBufferPointer
32-bitabsolutebyteaddressinbufferintowhichdataiscurrentlybeingreceived
TheReceiveCPPIDMAStateWord5(RCPPIDMASTATEW5)isshowninFigure57anddescribedin
Table58.
Figure57.ReceiveCPPIDMAStateWord5(RCPPIDMASTATEW5)
3116
PKT_LENGTH
R/W-0
150
CURR_BUFFER_LENGTH
R/W-0
LEGEND:R/W=Read/Write;-n=valueafterreset
Table58.ReceiveCPPIDMAStateWord5(RCPPIDMASTATEW5)FieldDescriptions
BitFieldValueDescription
31-16PKT_LENGTH0-FFFFhPacketLength
Indicateshowmanybytesarecontainedinthepacket.Thisvalueiswritteninto
bits15:0ofWord3oftheSOPDescriptorduringendofpacketprocessing.
15-0CURR_BUFFER_LENGTH0-FFFFhCurrentBufferLength
Indicateshowmanyfreebytesremaininthecurrentbufferthatisbeingreceived
into
SPRUGH3–November2008UniversalSerialBus(USB)Controller109
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