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4.33TransmitCPPIDMAStateWord3(TCPPIDMASTATEW3)
4.34TransmitCPPIDMAStateWord4(TCPPIDMASTATEW4)
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Registers
Table48.TransmitCPPIDMAStateWord2(TCPPIDMASTATEW2)FieldDescriptions(continued)
BitFieldValueDescription
0Reserved0Reserved
TheTransmitCPPIDMAStateWord3(TCPPIDMASTATEW3)isshowninFigure48anddescribedin
Table49.
Figure48.TransmitCPPIDMAStateWord3(TCPPIDMASTATEW3)
310
CURR_BUFFER_PTR
R/W-0
LEGEND:R/W=Read/Write;-n=valueafterreset
Table49.TransmitCPPIDMAStateWord3(TCPPIDMASTATEW3)FieldDescriptions
BitFieldValueDescription
31-0CURR_BUFFER_PTR0-FFFFFFFFhCurrentBufferPointer
32-bitabsolutebyteaddressinbufferfromwhichdataiscurrentlybeing
transmitted
TheTransmitCPPIDMAStateWord4(TCPPIDMASTATEW4)isshowninFigure49anddescribedin
Table50.
Figure49.TransmitCPPIDMAStateWord4(TCPPIDMASTATEW4)
312423181716
DESC_MSGReservedCURR_BUFFER_EOPCURR_BUFFER_SOP
R/W-0R-0R/W-0R/W-0
150
CURR_BUFFER_LENGTH
R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table50.TransmitCPPIDMAStateWord4(TCPPIDMASTATEW4)FieldDescriptions
BitFieldValueDescription
31-24DESC_MSG0-FFhDescriptorMessage
BytewhichispassedfromtheSOPTxDescriptortotheSOPReceive
descriptor.Usedtotagpackets.
23-18Reserved0Reserved
17CURR_BUFFER_EOP0-1CurrentBufferisEOP
Flagindicatingwhetherornotthecurrentbufferthatisbeingtransmittedfromis
theendofpacketbuffer
16CURR_BUFFER_SOP0-1CurrentBufferisSOP
Flagindicatingwhetherornotthecurrentbufferthatisbeingtransmittedfromis
thestartofpacketbuffer
SPRUGH3–November2008UniversalSerialBus(USB)Controller103
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