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VideoDisplayRegisters
Table4-7.VideoDisplayControlRegister(VDCTL)FieldDescriptions(continued)
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
23FXSOF(value)Fieldexternalsynchronizationenablebit.
DEFAULT0VCTL3isanoutput.
OUTPUT
FSINPUT1VCTL3isanexternalfieldsyncinput.
22VXSOF(value)Verticalexternalsynchronizationenablebit.
DEFAULT0VCTL2isanoutput.
OUTPUT
VSINPUT1VCTL2isanexternalverticalsyncinput.
21HXSOF(value)Horizontalexternalsynchronizationenablebit.
DEFAULT0VCTL1isanoutput.
OUTPUT
HSINPUT1VCTL1isanexternalhorizontalsyncinput.
20VCTL3SOF(value)VCTL3outputselectbit.
DEFAULT0OutputCBLNK
CBLNK
FLD1OutputFLD
19-18VCTL2SOF(value)0-3hVCTL2outputselectbit.
DEFAULT0OutputVSYNC
VYSYNC
VBLNK1hOutputVBLNK
CSYNC2hOutputCSYNC
FLD3hOutputFLD
17-16VCTL1SOF(value)0-3hVCTL1outputselectbit.
DEFAULT0OutputHSYNC
HYSYNC
HBLNK1hOutputHBLNK
AVID2hOutputAVID
FLD3hOutputFLD
15VDENOF(value)Videodisplayenablebit.OtherbitsinVDCTL(exceptRSTCHandBLKDISbits)may
onlybechangedwhenVDEN=0.
DEFAULT0Videodisplayisdisabled.
DISABLE
ENABLE1Videodisplayisenabled.
14Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
13RGBXOF(value)RGBextractenablebit.
DEFAULT0Notused.
DISABLE
ENABLE1Notused.PerformFIFOunpacking.
12RSYNCOF(value)Second,synchronizedrawdatachannelenablebit.
DEFAULT0Notused.Second,synchronizedrawdatachannel
isdisabled.
DISABLE
ENABLE1Notused.Second,synchronizedrawdatachannel
isenabled.
SPRUEM1–May2007VideoDisplayPort125
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