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VideoCaptureRegisters
Figure3-30.VideoCaptureChannelBControlRegister(VCBCTL)
31302924
RSTCHBLKCAPReserved
R/WS-0R/W-1R-0
23212019181716
ReservedFINVReservedVRSTHRST
R-0R/W-0R-0R/W-1R/W-0
15141312111098
VCENReservedLFDESFDERESMPLReservedSCALE
R/W-0R-0R/W-0R/W-0R/W-0R-0R/W-0
76543210
CONFRAMECF2CF1ReservedCMODE
R/W-0R/W-0R/W-1R/W-1R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;WS=Write1toreset,awriteof0hasnoeffect;-n=valueafterreset
Table3-23.VideoCaptureChannelBControlRegister(VCBCTL)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656orY/CModeRawDataModeTCIMode
31RSTCHOF(value)Resetchannelbit.Write1toresetthebit,awriteof0hasnoeffect.
DEFAULT0Noeffect.
NONE
RESET1ResetsthechannelbyblockingfurtherEDMAeventgenerationandflushingtheFIFO
uponcompletionofanypendingEDMAs.AlsoclearstheVCENbit.Allchannel
registersaresettotheirinitialvalues.RSTCHisauto-clearedafterchannelresetis
complete.
30BLKCAPOF(value)Blockcaptureeventsbit.BLKCAPfunctionsasacaptureFIFOresetwithoutaffecting
thecurrentprogrammableregistervalues.
TheF1C,F2C,andFRMCstatusbits,inVCBSTAT,arenotupdated.Fieldorframe
completeinterruptsandverticalinterruptsarealsonotgenerated.
ClearingBLKCAPdoesnotenableEDMAeventsduringthefieldwherethebitis
cleared.WheneverBLKCAPissetandthencleared,thesoftwareneedstoclearthe
fieldandframestatusbits(F1C,F2C,andFRMC)aspartoftheBLKCAPclear
operation.
CLEAR0EnablesEDMAeventsinthevideoframethatfollowsthevideoframewherethebitis
cleared.(ThecapturelogicmustsynctothestartofthenextframeafterBLKCAPis
cleared.)
DEFAULT1BlocksEDMAeventsandflushesthecapturechannelFIFOs.
BLOCK
29-21Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
20FINVOF(value)Detectedfieldinvertbit.
DEFAULT0Detected0isfield1.Notused.Notused.
FIELD1
FIELD21Detected0isfield2.Notused.Notused.
19-18Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
17VRSTOF(value)VCOUNTresetmethodbit.
V1EAV0Startofverticalblank(1
st
V=1Notused.Notused.
EAVorVCTL2activeedge)
DEFAULT1Endofverticalblank(1
st
V=0Notused.Notused.
EAVorVCTL2inactiveedge)
V0EAV
(1)
ForCSLimplementation,usethenotationVP_VCBCTL_field_symval
VideoCapturePort 82SPRUEM1–May2007
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