Filter
Top Products
4.53FrameNumberRegister(FRAME)
4.54IndexRegisterforSelectingtheEndpointStatusandControlRegisters(INDEX)
www.ti.com
Registers
TheFrameNumberRegister(FRAME)isshowninFigure68anddescribedinTable69.
Figure68.FrameNumberRegister(FRAME)
1511100
ReservedFRAMENUMBER
R-0R-0
LEGEND:R=Readonly;-n=valueafterreset
Table69.FrameNumberRegister(FRAME)FieldDescriptions
BitFieldValueDescription
15-11Reserved0Reserved
10-0FRAMENUMBER0-7FFhLastreceivedframenumber
TheIndexRegisterforSelectingtheEndpointStatusandControlRegisters(INDEX)isshowninFigure69
anddescribedinTable70.
Figure69.IndexRegisterforSelectingtheEndpointStatusandControlRegisters(INDEX)
7430
ReservedEPSEL
R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table70.IndexRegisterforSelectingtheEndpointStatusandControlRegisters(INDEX)
FieldDescriptions
BitFieldValueDescription
7-4Reserved0Reserved
3-0EPSEL0-FhEachtransmitendpointandeachreceiveendpointhavetheirownsetofcontrol/statusregisters.EPSEL
determineswhichendpointcontrol/statusregistersareaccessed.
Beforeaccessinganendpoint'scontrol/statusregisters,theendpointnumbershouldbewrittentothe
Indexregistertoensurethatthecorrectcontrol/statusregistersappearinthememorymap.
SPRUGH3–November2008UniversalSerialBus(USB)Controller117
SubmitDocumentationFeedback