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VideoCaptureRegisters
Figure3-22.VideoCaptureChannelAControlRegister(VCACTL)
31302924
RSTCHBLKCAPReserved
R/WS-0R/W-1R-0
2322212019181716
ReservedRDFEFINVEXCFLDDVRSTHRST
R-0R/W-0R/W-0R/W-0R/W-0R/W-1R/W-0
15141312111098
VCENReservedLFDESFDERESMPLReservedSCALE
R/W-0R-0R/W-0R/W-0R/W-0R-0R/W-0
7654320
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
Table3-15.VideoCaptureChannelAControlRegister(VCACTL)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656orY/CModeRawDataModeTCIMode
31RSTCHOF(value)Resetchannelbit.Write1toresetthebit,awriteof0hasnoeffect.
DEFAULT0Noeffect.
NONE
RESET1ResetsthechannelbyblockingfurtherEDMAeventgenerationandflushingthe
FIFOuponcompletionofanypendingEDMAs.AlsoclearstheVCENbit.All
channelregistersaresettotheirinitialvalues.RSTCHisauto-clearedafter
channelresetiscomplete.
30BLKCAPOF(value)Blockcaptureeventsbit.BLKCAPfunctionsasacaptureFIFOresetwithout
affectingthecurrentprogrammableregistervalues.
TheF1C,F2C,andFRMCstatusbits,inVCASTAT,arenotupdated.Fieldor
framecompleteinterruptsandverticalinterruptsarealsonotgenerated.
ClearingBLKCAPdoesnotenableEDMAeventsduringthefieldwherethebit
iscleared.WheneverBLKCAPissetandthencleared,thesoftwareneedsto
clearthefieldandframestatusbits(F1C,F2C,andFRMC)aspartofthe
BLKCAPclearoperation.
CLEAR0EnablesEDMAeventsinthevideoframethatfollowsthevideoframewhere
thebitiscleared.(Thecapturelogicmustsynctothestartofthenextframe
afterBLKCAPiscleared.)
DEFAULT1BlocksEDMAeventsandflushesthecapturechannelFIFOs.
BLOCK
29-22Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
21RDFEOF(value)Fieldidentificationenablebit.(ChannelAonly)
DEFAULT0Notused.FieldidentificationisNotused.
disabled.
DISABLE
ENABLE1Notused.FieldidentificationisNotused.
enabled.
20FINVOF(value)Detectedfieldinvertbit.
DEFAULT0Detected0isfield1.Notused.Notused.
FIELD1
FIELD21Detected0isfield2.Notused.Notused.
(1)
ForCSLimplementation,usethenotationVP_VCACTL_field_symval
SPRUEM1–May2007VideoCapturePort73
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