Filter
Top Products
www.ti.com
4.12.16VideoDisplayHorizontalSynchronizationRegister(VDHSYNC)
4.12.17VideoDisplayField1VerticalSynchronizationStartRegister(VDVSYNS1)
VideoDisplayRegisters
Table4-20.VideoDisplayThresholdRegister(VDTHRLD)FieldDescriptions(continued)
Description
Bitfield
(1)
symval
(1)
ValueBT.656andY/CModeRawDataMode
11-10Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
9-0VDTHRLD1OF(value)0-3FFhField1threshold.WheneverthereareatField1threshold.Wheneverthereareat
leastVDTHRLDdoublewordsofspaceleastVDTHRLDdoublewordsofspace
intheYdisplayFIFO,anewYEDMAinthedisplayFIFO,anewYEDMA
eventmaybegenerated.Whenevereventmaybegenerated.
thereareatleast½VDTHRLDdouble
wordsofspaceintheCborCrdisplay
FIFO,anewCborCrEDMAeventmay
begenerated.
DEFAULT0
Thevideodisplayhorizontalsynchronizationregister(VDHSYNC)controlsthetimingofthehorizontal
synchronizationsignal.
GenerationofthehorizontalsynchronizationisshowninFigure4-5.TheHSYNCsignalisassertedto
indicatethestartofthehorizontalsyncpulsewhenevertheframepixelcounter(FPCOUNT)isequalto
HSYNCSTART.TheHSYNCsignalisde-assertedtoindicatetheendofthehorizontalsyncpulse
wheneverFPCOUNT=HSYNCSTOP.
Figure4-46.VideoDisplayHorizontalSynchronizationRegister(VDHSYNC)
31282716
ReservedHSYNCSTOP
R-0R/W-0
1512110
ReservedHSYNCSTART
R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-21.VideoDisplayHorizontalSynchronizationRegister(VDHSYNC)FieldDescriptions
Bitfield
(1)
symval
(1)
ValueDescription
31-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
27-16HSYNCSTOPOF(value)0-FFFhSpecifiesthepixelwhereHSYNCisde-asserted.
DEFAULT0
15-12Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
11-0HSYNCSTARTOF(value)0-FFFhSpecifiesthepixelwhereHSYNCisasserted.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDHSYNC_field_symval
Thevideodisplayfield1verticalsynchronizationstartregister(VDVSYNS1)controlsthestartofvertical
synchronizationinfield1.
GenerationoftheverticalsynchronizationisshowninFigure4-6.TheVSYNCsignalisasserted
whenevertheframelinecounter(FLCOUNT)isequaltoVSYNCYSTART1andtheframepixelcounter
(FPCOUNT)isequaltoVSYNCXSTART1.
138VideoDisplayPortSPRUEM1–May2007
SubmitDocumentationFeedback