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4.12.25VideoDisplayVerticalInterruptRegister(VDVINT)
VideoDisplayRegisters
Figure4-54.VideoDisplayDefaultDisplayValueRegister(VDDEFVAL)
31242316
CRDEFVALCBDEFVAL
R/W-0R/W-0
15870
ReservedYDEFVAL
R/W-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Figure4-55.VideoDisplayDefaultDisplayValueRegister(VDDEFVAL)-RawDataMode
31201916
ReservedDEFVAL
R/W-0R/W-0
150
DEFVAL
R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-29.VideoDisplayDefaultDisplayValueRegister(VDDEFVAL)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
31-24CRDEFVALOF(value)0-FFhSpecifiesthe8MSBsofthedefaultCrNotused.
displayvalue.
DEFAULT0
31-20
(2)
Reserved-0Notused.Reserved.Thereservedbitlocationis
alwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
19-0
(2)
DEFVALOF(value)0-FFFFFhNotused.Specifiesthedefaultrawdatadisplay
value.
DEFAULT0
23-16CBDEFVALOF(value)0-FFhSpecifiesthe8MSBsofthedefaultCbNotused.
displayvalue.
DEFAULT0
15-8Reserved-0Reserved.ThereservedbitlocationisNotused.
alwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
7-0YDEFVALOF(value)0-FFhSpecifiesthe8MSBsofthedefaultYNotused.
displayvalue.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDDEFVAL_field_symval
(2)
Rawdatamodeonly.
Thevideodisplayverticalinterruptregister(VDVINT)controlsthegenerationofverticalinterruptsinfield1
andfield2.
Aninterruptcanbegenerateduponcompletionofthespecifiedlineinafield(whenFLCOUNT=VINTn).
Thisallowsthesoftwaretosynchronizeitselftotheframeorfield.Theinterruptcanbeprogrammedto
occurinone,both,ornofieldsusingtheVIF1andVIF2bits.
Thevideodisplayfieldbitregister(VDVINT)isshowninFigure4-56anddescribedinTable4-30.
VideoDisplayPort 144SPRUEM1–May2007
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