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4.12.2VideoDisplayControlRegister(VDCTL)
VideoDisplayRegisters
Figure4-31.VideoDisplayStatusRegister(VDSTAT)
313029282716
ReservedFRMDF2DF1DVDYPOS
R-0R/WC-0R/WC-0R/WC-0R-0
15141312110
ReservedVBLNKVDFLDVDXPOS
R-0R-0R-0R-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-6.VideoDisplayStatusRegister(VDSTAT)FieldDescriptions
Bitfield
(1)
symval
(1)
ValueDescription
31Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
30FRMDOF(value)Framedisplayedbit.Write1toclearthebit,awriteof0hasnoeffect.
DEFAULT0Completeframehasnotbeendisplayed.
NONE
DISPLAYED1Completeframehasbeendisplayed.
CLEAR
29F2DOF(value)Field2displayedbit.Write1toclearthebit,awriteof0hasnoeffect.
DEFAULT0Field2hasnotbeendisplayed.
NONE
DISPLAYED1Field2hasbeendisplayed.
CLEAR
28F1DOF(value)Field1displayedbit.Write1toclearthebit,awriteof0hasnoeffect.
DEFAULT0Field1hasnotbeendisplayed.
NONE
DISPLAYED1Field1hasbeendisplayed.
CLEAR
27-16VDYPOSOF(value)0-FFFhCurrentframelinecounter(FLCOUNT)value.Indexofthecurrentlineinthecurrent
fieldbeingdisplayedbythemodule.
DEFAULT0
15-14Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
13VBLNKOF(value)Verticalblankingbit.
DEFAULT0Videodisplayisnotinavertical-blankinginterval.
EMPTY
NOTEMPTY1Videodisplayisinavertical-blankinginterval.
12VDFLDOF(value)VDFLDbitindicateswhichfieldiscurrentlybeingdisplayed.TheVDFLDbitis
updatedatthestartoftheverticalblankingintervalofthenextfield.
DEFAULT0Field1isactive.
FIELD1ACT
FIELD2ACT1Field2isactive.
11-0VDXPOSOF(value)0-FFFhCurrentframepixelcounter(FPCOUNT)value.Indexofthemostrecentlyoutput
pixel.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVD_VDSTAT_field_symval
Forvideodisplaymode,fielddetectisenabledautomaticallywhentheVXSbitissetto1andtheFXSbit
isclearedto0.EnsurethattheFXSbitisnotsetto1becausethiscausesthevideoporttoexpectafiled
inputonthepin.
SPRUEM1–May2007VideoDisplayPort123
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