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Data Buffer
(5120 bytes)
VDIN[19−2]
16
Capture FIFO
YSRCA
64
1.2.3VideoDisplayFIFOConfigurations
Y Buffer
(2560 bytes)
Cb Buffer
(1280 bytes)
Cr Buffer
(1280 bytes)
YDSTA
CBDST
CRDST
VDOUT[9−2]
Display FIFO
8
8
8
64
64
64
Data Buffer
(5120 bytes)
YDSTA
VDOUT[9−2]
64
8
Display FIFO
VideoPortFIFO
For16-bitrawvideo,theFIFOisconfiguredasasinglebuffer,asshowninFigure1-5.TheFIFOreceives
16-bitdatafromtheVDIN[19-2]bus.TheFIFOhasasinglewritepointerandreadregister(YSRCA).
Figure1-5.16-BitRawVideoCaptureFIFOConfiguration
Duringvideodisplayoperation,thevideoportFIFOhasoneoffiveconfigurationsdependingonthe
displaymode.ForBT.656operation,asingleoutputisprovidedonchannelA,asshowninFigure1-6,
withdataoutputonVDOUT[9-2].Thechannel'sFIFOissplitintoY,Cb,andCrbufferswithseparateread
pointersandwriteregisters(YDSTA,CBDST,andCRDST).
Figure1-6.BT.656VideoDisplayFIFOConfiguration
For8-bitrawvideo,theFIFOisconfiguredasasinglebufferasshowninFigure1-7.TheFIFOoutputs
dataontheVDOUT[9-2]halfofthebus.TheFIFOhasasinglereadpointerandwriteregister(YDSTA).
Figure1-7.8-BitRawVideoDisplayFIFOConfiguration
SPRUEM1–May2007Overview23
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