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PCLK
(PositiveEdgeClocking)
18
20
HD
VD
PCLK
(NegativeEdgeClocking)
5.9.2VideoProcessingBack-End(VPBE)
TMS320DM355
DigitalMediaSystem-on-Chip(DMSoC)
SPRS463A–SEPTEMBER2007–REVISEDSEPTEMBER2007
Table5-20.SwitchingCharacteristicsOverRecommendedOperatingConditionsforVPFE(CCD)Master
Mode(seeFigure5-26)
DM355
NO.PARAMETERUNIT
MINMAX
18t
d(PCLKL-HDIV)
Delaytime,PCLKedgetoHDinvalid311ns
20t
d(PCLKL-VDIV)
Delaytime,PCLKedgetoVDinvalid311ns
Figure5-26.VPFE(CCD)MasterModeControlOutputDataTiming
TheVideoProcessingBack-EndofVPBEmoduleiscomprisedoftheOnScreenDisplay(OSD)module
andtheVideoEncoder/DigitalLCDController(VENC/DLCD).
5.9.2.1On-ScreenDisplay(OSD)
TheprimaryfunctionoftheOSDmoduleistogatherandblendvideodataanddisplay/bitmapdataand
thenpassittotheVideoEncoder(VENC)inYCbCrformat.Thevideoanddisplaydataisreadfrom
externalDDR2/mDDRmemory.TheOSDisprogrammedviacontrolandparameterregisters.The
followingaretheprimaryfeaturesthataresupportedbytheOSD.
•SupportfortwovideowindowsandtwoOSDbitmappedwindowsthatcanbedisplayedsimultaneously
(VIDWIN0/VIDWIN1andOSDWIN0/OSDWIN1).
•VideowindowssupportsYCbCrdatain422formatfromexternalmemory,withtheabilityto
interchangetheorderoftheCbCrcomponentinthe32-bitword
•OSDbitmapwindowssupport1/2/4/8bitwidthindexdataofcolorpalette
•InadditiononeOSDbitmapwindowatatimecanbeconfiguredtooneofthefollowing:
–YUV422(sameasvideodata)
–RGBformatdatain16-bitmode(R=5bit,G=6bit,B=5bit)
–24-bitmode(eachR/G/B=8bit)withpixellevelblendingwithvideowindows
•ProgrammablecolorpalettewiththeabilitytoselectbetweenaRAM/ROMtablewithsupportfor256
colors.
•Supportfor2ROMtables,oneofwhichcanbeselectedatagiventime
•Separateenable/disablecontrolforeachwindow
•Programmablewidth,height,andbasestartingcoordinatesforeachwindow
•Externalmemoryaddressandoffsetregistersforeachwindow
•Supportforx2andx4zoominboththehorizontalandverticaldirection
•Pixel-levelblending/transparency/blinkingattributescanbedefinedforOSDWIN0whenOSDWIN1is
configuredasanattributewindowforOSDWIN0.
•Supportforblinkingintervalstotheattributewindow
•Abilitytoselecteitherfield/framemodeforthewindows(interlaced/progressive)
•Aneightstepblendingprocessbetweenthebitmapandvideowindows
•Transparencysupportforthebitmapandvideodata(whenabitmappixeliszero,therewillbeno
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