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3.13.1VideoCaptureChannelxStatusRegister(VCASTAT,VCBSTAT)
VideoCaptureRegisters
Table3-13.VideoCaptureControlRegisters(continued)
Offset
Address
(1)
AcronymRegisterNameSection
154hVCBSTOP2VideoCaptureChannelBField2StopRegisterSection3.13.6
158hVCBVINTVideoCaptureChannelBVerticalInterruptRegisterSection3.13.7
15ChVCBTHRLDVideoCaptureChannelBThresholdRegisterSection3.13.8
160hVCBEVTCTVideoCaptureChannelBEventCountRegisterSection3.13.9
180hTCICTLTCICaptureControlRegisterSection3.13.11
184hTCICLKINITLTCIClockInitializationLSBRegisterSection3.13.12
188hTCICLKINITMTCIClockInitializationMSBRegisterSection3.13.13
18ChTCISTCLKLTCISystemTimeClockLSBRegisterSection3.13.14
190hTCISTCLKMTCISystemTimeClockMSBRegisterSection3.13.15
194hTCISTCMPLTCISystemTimeClockCompareLSBRegisterSection3.13.16
198hTCISTCMPMTCISystemTimeClockCompareMSBRegisterSection3.13.17
19ChTCISTMSKLTCISystemTimeClockCompareMaskLSBRegisterSection3.13.18
1A0hTCISTMSKMTCISystemTimeClockCompareMaskMSBRegisterSection3.13.19
1A4hTCITICKSTCISystemTimeClockTicksInterruptRegisterSection3.13.20
Thevideocapturechannelxstatusregister(VCASTAT,VCBSTAT)indicatesthecurrentstatusofthe
videocapturechannel.
InBT.656capturemode,theVCXPOSandVCYPOSbitsindicatetheHCOUNTandVCOUNTvalues,
respectively,totrackthecoordinatesofthemostrecentlyreceivedpixel.TheF1C,F2C,andFRMCbits
indicatecompletionoffieldsorframesandmayneedtobeclearedbytheDSPforcapturetocontinue,
dependingontheselectedframecaptureoperation(seeSection3.4.1).
InrawdataandTCImodes,theVCXPOSandVCYPOSbitsreflectthelowerandupper12bits,
respectively,ofthe24-bitdatacounterthattracksthenumberofreceiveddatasamples.TheFRMCbit
indicateswhenanentiredatapackethasbeenreceivedandmayneedtobeclearedbytheDSPfor
capturetocontinue,dependingontheselectedframeoperation(seeSection3.7.1andSection3.8.5).
Thevideocapturechannelxstatusregister(VCxSTAT)isshowninFigure3-21anddescribedin
Table3-14.
Figure3-21.VideoCaptureChannelxStatusRegister(VCxSTAT)
313029282716
FSYNCFRMCF2CF1CVCYPOS
R-0R/WC-0R/WC-0R/WC-0R-0
151312110
ReservedVCFLDVCXPOS
R-0R-0R-0
LEGEND:R=Readonly;WC=Write1toclear,awriteof0hasnoeffect;-n=valueafterreset
SPRUEM1–May2007VideoCapturePort71
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