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4.12.8VideoDisplayField2VerticalBlankingEndRegister(VDVBLKE2)
VideoDisplayRegisters
Table4-12.VideoDisplayField2VerticalBlankingStartRegister(VDVBLKS2)FieldDescriptions
(continued)
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
11-0VBLNKXSTART2OF(value)0-FFFhSpecifiesthepixel(inFPCOUNT)Specifiesthepixel(inFPCOUNT)
whereVBLNKactiveedgeoccursforwhereverticalblankingbegins(VBLNK
field2.activeedge)forfield2.
DEFAULT0
Thevideodisplayfield2verticalblankingendregister(VDVBLKE2)controlstheendofverticalblankingin
field2.
Inrawdatamode,VBLNKisde-assertedwhenevertheframelinecounter(FLCOUNT)isequalto
VBLNKYSTOP2andtheframepixelcounter(FPCOUNT)isequaltoVBLNKXSTOP2(thisisshownin
Figure4-6.
InBT.656andY/Cmode,VBLNKisde-assertedwheneverFLCOUNT=VBLNKYSTOP2andFPCOUNT
=VBLNKXSTOP2.ThisVBLNKoutputcontroliscompletelyindependentofthetimingcontrolcodes.The
VbitintheEAV/SAVcodesforfield2iscontrolledbytheVDVBIT2register.
Thevideodisplayfield2verticalblankingendregister(VDVBLKE2)isshowninFigure4-38anddescribed
inTable4-13.
Figure4-38.VideoDisplayField2VerticalBlankingEndRegister(VDVBLKE2)
31282716
ReservedVBLNKYSTOP2
R-0R/W-0
1512110
ReservedVBLNKXSTOP2
R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-13.VideoDisplayField2VerticalBlankingEndRegister(VDVBLKE2)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
31-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
27-16VBLNKYSTOP2OF(value)0-FFFhSpecifiestheline(inFLCOUNT)whereSpecifiestheline(inFLCOUNT)where
VBLNKinactiveedgeoccursforfield2.verticalblankingends(VBLNKinactive
DoesnotaffectEAV/SAVVbitedge)forfield2.
operation.
DEFAULT0
15-12Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
11-0VBLNKXSTOP2OF(value)0-FFFhSpecifiesthepixel(inFPCOUNT)Specifiesthepixel(inFPCOUNT)
whereVBLNKinactiveedgeoccursforwhereverticalblankingends(VBLNK
field2.inactiveedge)forfield2.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDVBLKE2_field_symval
SPRUEM1–May2007VideoDisplayPort131
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