Filter
Top Products
www.ti.com
4.12.11VideoDisplayField2ImageOffsetRegister(VDIMGOFF2)
VideoDisplayRegisters
Thevideodisplayfield2imageoffsetregister(VDIMGOFF2)definesthefield2imageoffsetandspecifies
thestartinglocationofthedisplayedimagerelativetothestartoftheactivedisplay.
Theimagelinecounter(ILCOUNT)isresetto1onthefirstimageline(whenFLCOUNT=
VBLNKYSTOP2+IMGVOFF2).IftheNVbitisset,ILCOUNTisresetto1whenFLCOUNT=
VBLNKYSTOP2-IMGVOFF2.Displayimagepixelsareoutputinfield2beginningonthelinewhere
ILCOUNT=1.Thedefaultoutputvaluesorblankingvaluesareoutputduringactivelinespriorto
ILCOUNT=1.Foranegativeoffset,IMGVOFF2mustnotbegreaterthanVBLNKYSTOP2.Thefield2
activeimagemustnotoverlapthefield2activeimage.
Theimagepixelcounter(IPCOUNT)isresetto0atthestartofanactivelineimage.OnceILCOUNT=1,
imagepixelsfromtheFIFOareoutputoneachlineinfield2beginningwhenFPCOUNT=IMGHOFF2.If
theNHbitisset,IPCOUNTisresetwhenFPCOUNT=FRMWIDTH-IMGHOFF2.Thedefaultoutput
valuesorblankingvaluesareoutputduringactivepixelspriortoIMGHOFF2.
Thevideodisplayfield2imageoffsetregister(VDIMGOFF2)isshowninFigure4-41anddescribedin
Table4-16.
Figure4-41.VideoDisplayField2ImageOffsetRegister(VDIMGOFF2)
3130282716
NVReservedIMGVOFF2
R/W-0R-0R/W-0
151412110
NHReservedIMGHOFF2
R/W-0R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-16.VideoDisplayField2ImageOffsetRegister(VDIMGOFF2)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
31NVOF(value)Negativeverticalimageoffsetenablebit.
DEFAULT0Notused.
NONE
NEGOFF1DisplayimagewindowbeginsbeforetheNotused.
firstactivelineoffield2.(UsedforVBI
dataoutput.)
30-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
27-16IMGVOFF2OF(value)0-FFFhSpecifiesthedisplayimageverticaloffsetinlinesfromthefirstactivelineoffield2.
DEFAULT0
15NHOF(value)Negativehorizontalimageoffset.
DEFAULT0Notused.
NONE
NEGOFF1DisplayimagewindowbeginsbeforetheNotused.
startofactivevideo.(UsedforHANC
dataoutput.)
14-12Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
11-0IMGHOFF2OF(value)0-FFFhSpecifiesthedisplayimagehorizontalSpecifiesthedisplayimagehorizontal
offsetinpixelsfromthestartofeachlineoffsetinpixelsfromthestartofeachline
ofactivevideoinfield2.Thismustbeanofactivevideoinfield2.
evennumber(theLSBistreatedas0).
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDIMGOFF2_field_symval
VideoDisplayPort 134SPRUEM1–May2007
SubmitDocumentationFeedback