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Cr Buffer (1280
bytes)
Cb Buffer
(1280 bytes)
CRDST
CBDST
64
64
VDOUT[19−12]
8
8
Y Buffer
(2560 bytes)
YDSTA
64
VDOUT[9−2]
Display FIFO
8
1.3VideoPortRegisters
VideoPortRegisters
ForY/Cvideodisplay,theFIFOisconfiguredasasinglechannelsplitintoseparateY,Cb,andCrbuffers
withseparatereadpointersandwriteregisters(YDSTA,CBDST,andCRDST).Figure1-10showshowY
dataisoutputontheVDOUT[9-2]halfofthebusandCb/Crdataismultiplexedandoutputonthe
VDOUT[19-12]halfofthebus.
Figure1-10.Y/CVideoDisplayFIFOConfiguration
Thevideoportconfigurationregisterspaceisdividedintoseveraldifferentsectionswithregistersgrouped
byfunctionincludingtop-levelvideoportcontrol,videocapturecontrol,videodisplaycontrol,andGPIO.
TheregistersforcontrollingthevideoportareinSection2.4.
TheregistersforcontrollingthevideocapturemodeofoperationareshowninSection3.13.Anadditional
spaceisdedicatedforFIFOreadpseudo-registersasshowninSection3.14.Thisspacerequires
high-speedaccessandisnotmappedtotheregisteraccessbus.
TheregistersforcontrollingthevideodisplaymodeofoperationareshowninSection4.12.Anadditional
spaceisdedicatedforFIFOwritepseudo-registersasshowninSection4.14.Thisspacerequires
high-speedaccessandisnotmappedtotheregisteraccessbus.
Theregistersforcontrollingthegeneral-purposeinput/output(GPIO)areshowninSection5.1.
SPRUEM1–May2007Overview25
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