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VideoCaptureRegisters
Table3-15.VideoCaptureChannelAControlRegister(VCACTL)FieldDescriptions(continued)
Description
Bitfield
(1)
symval
(1)
ValueBT.656orY/CModeRawDataModeTCIMode
19EXCOF(value)Externalcontrolselectbit.(ChannelAonly)
DEFAULT0UseEAV/SAVcodes.Notused.Notused.
EAVSAV
EXTERN1Useexternalcontrolsignals.Notused.Notused.
18FLDDOF(value)Fielddetectmethodbit.(ChannelAonly)
DEFAULT01
st
lineEAVorFIDinput.Notused.Notused.
EAVFID
FDL1Fielddetectlogic.Notused.Notused.
17VRSTOF(value)VCOUNTresetmethodbit.
V1EAV0Startofverticalblank(1
st
V=1Notused.Notused.
EAVorVCTL2activeedge)
DEFAULT1Endofverticalblank(1
st
V=0Notused.Notused.
EAVorVCTL2inactiveedge)
V0EAV
16HRSTOF(value)HCOUNTresetmethodbit.
DEFAULT0EAVorVCTL1activeedge.Notused.Notused.
EAV
SAV1SAVorVCTL1inactiveedge.Notused.Notused.
15VCENOF(value)Videocaptureenablebit.OtherbitsinVCACTL(exceptRSTCHandBLKCAP
bits)mayonlybechangedwhenVCEN=0.
DEFAULT0Videocaptureisdisabled.
DISABLE
ENABLE1Videocaptureisenabled.
14-13Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
12LFDEOF(value)Longfielddetectenablebit.
DEFAULT0Longfielddetectisdisabled.Notused.Notused.
DISABLE
ENABLE1Longfielddetectisenabled.Notused.Notused.
11SFDEOF(value)Shortfielddetectenablebit.
DEFAULT0Shortfielddetectisdisabled.Notused.Notused.
DISABLE
ENABLE1Shortfielddetectisenabled.Notused.Notused.
10RESMPLOF(value)Chromare-samplingenablebit.
DEFAULT0Chromare-samplingisNotused.Notused.
disabled.
DISABLE
ENABLE1ChromaishorizontallyNotused.Notused.
re-sampledfrom4:2:2co-sited
to4:2:0interspersedbefore
savingtochromabuffers.
9Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
8SCALEOF(value)Scalingselectbit.
DEFAULT0NoscalingNotused.Notused.
NONE
HALF1½scalingNotused.Notused.
74VideoCapturePortSPRUEM1–May2007
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