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4.12.10VideoDisplayField1ImageSizeRegister(VDIMGSZ1)
VideoDisplayRegisters
Table4-14.VideoDisplayField1ImageOffsetRegister(VDIMGOFF1)FieldDescriptions(continued)
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
11-0IMGHOFF1OF(value)0-FFFhSpecifiesthedisplayimagehorizontalSpecifiesthedisplayimagehorizontal
offsetinpixelsfromthestartofeachlineoffsetinpixelsfromthestartofeachline
ofactivevideoinfield1.Thismustbeanofactivevideoinfield1.
evennumber(theLSBistreatedas0).
DEFAULT0
Thevideodisplayfield1imagesizeregister(VDIMGSZ1)definesthefield1imageareaandspecifiesthe
sizeofthedisplayedimagewithintheactivedisplay.
Theimagepixelcounter(IPCOUNT)countsdisplayedimagepixeloutputoneachofthedisplayedimage.
DisplayedimagepixeloutputstopswhenIPCOUNT=IMGHSIZE1.Thedefaultoutputvaluesorblanking
valuesareoutputfortheremainderoftheactiveline.
Theimagelinecounter(ILCOUNT)countsdisplayedimagelines.Displayedimageoutputstopswhen
ILCOUNT=IMGVSIZE1.Thedefaultoutputvaluesorblankingvaluesareoutputfortheremainderofthe
activefield.
Thevideodisplayfield1imagesizeregister(VDIMGSZ1)isshowninFigure4-40anddescribedin
Table4-15.
Figure4-40.VideoDisplayField1ImageSizeRegister(VDIMGSZ1)
31282716
ReservedIMGVSIZE1
R-0R/W-0
1512110
ReservedIMGHSIZE1
R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-15.VideoDisplayField1ImageSizeRegister(VDIMGSZ1)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
31-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
27-16IMGVSIZE1OF(value)0-FFFhSpecifiesthedisplayimageheightinlines.
DEFAULT0
15-12Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
11-0IMGHSIZE1OF(value)0-FFFhSpecifiesthedisplayimagewidthinSpecifiesthedisplayimagewidthin
pixels.Thisnumbermustbeeven(thepixels.
LSBistreatedas0).
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDIMGSZ1_field_symval
SPRUEM1–May2007VideoDisplayPort133
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