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4.56MaximumPacketSizeforPeripheral/HostTransmitEndpoint(TXMAXP)
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Registers
TheMaximumPacketSizeforPeripheral/HostTransmitEndpoint(TXMAXP)isshowninFigure71and
describedinTable72.
Figure71.MaximumPacketSizeforPeripheral/HostTransmitEndpoint(TXMAXP)
1511100
ReservedMAXPAYLOAD
R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table72.MaximumPacketSizeforPeripheral/HostTransmitEndpoint(TXMAXP)
FieldDescriptions
BitFieldValueDescription
15-11Reserved0Reserved
10-0MAXPAYLOAD0-FFhThemaximumpayloadtransmittedinasingletransaction.Thevaluesetcanbeupto1024bytes,
butissubjecttotheconstraintsplacedbytheUSBSpecificationonpacketsizesforBulk,Interrupt,
andIsochronoustransfersinfull-speedandhigh-speedoperations.Thevaluewrittentothisregister
shouldmatchthewMaxPacketSizefieldoftheStandardEndpointDescriptorfortheassociated
endpoint.Amismatchcouldcauseunexpectedresults.
SPRUGH3–November2008UniversalSerialBus(USB)Controller119
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