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4.31TransmitCPPIDMAStateWord1(TCPPIDMASTATEW1)
4.32TransmitCPPIDMAStateWord2(TCPPIDMASTATEW2)
Registers
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TheTransmitCPPIDMAStateWord1(TCPPIDMASTATEW1)isshowninFigure46anddescribedin
Table47.
Figure46.TransmitCPPIDMAStateWord1(TCPPIDMASTATEW1)
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
Table47.TransmitCPPIDMAStateWord1(TCPPIDMASTATEW1)FieldDescriptions
BitFieldValueDescription
31-2SOP_DESCRIPTOR_PTR0-3FFFFFFFhStartofPacketBufferDescriptorPointer
30-bitpointerto32-bitaligneddescriptorwhichisthefirstdescriptorforthe
currentpacket
1Reserved0Reserved
0IN_PACKETFlagindicatingtheDMAisinthemiddleofprocessingapacket
0Notcurrentlyinpacket
1Currentlyinpacket
TheTransmitCPPIDMAStateWord2(TCPPIDMASTATEW2)isshowninFigure47anddescribedin
Table48.
Figure47.TransmitCPPIDMAStateWord2(TCPPIDMASTATEW2)
3116
CURR_DESCRIPTOR_PTR
R/W-0
15210
CURR_DESCRIPTOR_PTRTRUNCATED_NON_EOPReserved
R/W-0R/W-0R-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table48.TransmitCPPIDMAStateWord2(TCPPIDMASTATEW2)FieldDescriptions
BitFieldValueDescription
31-2CURR_DESCRIPTOR_PTR0-3FFFFFFFhCurrentBufferDescriptorPointer
30-bitpointerto32-bitaligneddescriptorforbufferfromwhichdataiscurrently
beingtransmitted
1TRUNCATED_NON_EOPFlagindicatingthatpackettruncationhasoccurredonthecurrentpacketwithina
bufferwhichwasnotdesignatedastheendofpacketbuff
0Truncationwithinnonendofpacketbufferhasnotoccurred
1Truncationwithinnonendofpackethasoccurred
102UniversalSerialBus(USB)ControllerSPRUGH3–November2008
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