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3.9HCHeadControlRegister(HCCONTROLHEADED)
Registers
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TheHCheadcontrolregister(HCCONTROLHEADED)definesthephysicaladdressoftheheadendpoint
descriptor(ED)onthecontrolEDlist.HCCONTROLHEADEDisshowninFigure10anddescribedin
Table10.
Figure10.HCHeadControlRegister(HCCONTROLHEADED)
3116
CHED
R/W-0
15430
CHEDReserved
R/W-0R-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table10.HCHeadControlRegister(HCCONTROLHEADED)FieldDescriptions
BitFieldValueDescription
31-4CHED0-FFFFFFFhPhysicaladdressoftheheadEDonthecontrolEDlist.Thisfieldrepresentsbits31-4ofthe
physicaladdressoftheheadEDonthecontrolEDlist.EDsareassumedtobeginona16-byte
alignedaddress,sobits3-0ofthispointerareassumedtobe0.Fortherestrictionsonphysical
addresses,seeSection2.7.
3-0Reserved0Reserved
20UniversalSerialBusOHCIHostControllerSPRUFM8–September2008
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