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3.13.7VideoCaptureChannelxVerticalInterruptRegister(VCxVINT)
VideoCaptureRegisters
Thevideocapturechannelxverticalinterruptregister(VCAVINT,VCBVINT)controlsthegenerationof
verticalinterruptsineachfield.
InBT.656orY/Cmode,aninterruptcanbegenerateduponcompletionofthespecifiedlineinafield(end
oflinewhenVCOUNT=VINTn).Thisallowsthesoftwaretosynchronizetotheframeorfield.The
interruptcanbeprogrammedtooccurinoneorbothfields(ornotatall)usingtheVIF1andVIF2bits.The
VINTnbitsalsodeterminewhentheFSYNCbitinVCxSTATiscleared.IfFSCL2is0,thentheFSYNCbit
isclearedinfield1whenVCOUNT=VINT1;ifFSCL2is1,thentheFSYNCbitisclearedinfield2when
VCOUNT=VINT2.
Thevideocapturechannelxverticalinterruptregister(VCxVINT)isshowninFigure3-27anddescribedin
Table3-20.
Figure3-27.VideoCaptureChannelxVerticalInterruptRegister(VCxVINT)
313029282716
VIF2FSCL2ReservedVINT2
R/W-0R/W-0R-0R/W-0
151412110
VIF1ReservedVINT1
R/W-0R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table3-20.VideoCaptureChannelxVerticalInterruptRegister(VCxVINT)FieldDescriptions
Description
Bitfield
(1)
symval
(1)
ValueBT.656orY/CModeRawDataModeTCIMode
31VIF2OF(value)SettingofVINTinfield2enablebit.
DEFAULT0SettingofVINTinfield2isNotused.Notused.
disabled.
DISABLE
ENABLE1SettingofVINTinfield2isNotused.Notused.
enabled.
30FSCL2OF(value)FSYNCbitclearedinfield2enablebit.
DEFAULT0FSYNCbitisnotcleared.Notused.Notused.
NONE
FIELD21FSYNCbitisclearedinfield2Notused.Notused.
insteadoffield1.
29-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
27-16VINT2OF(value)0-FFFhLinethatverticalinterruptNotused.Notused.
occursifVIF2bitisset.
DEFAULT0
15VIF1OF(value)SettingofVINTinfield1enablebit.
DEFAULT0SettingofVINTinfield1isNotused.Notused.
disabled.
DISABLE
ENABLE1SettingofVINTinfield1isNotused.Notused.
enabled.
14-12Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
11-0VINT1OF(value)0-FFFhLinethatverticalinterruptNotused.Notused.
occursifVIF1bitisset.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VCxVINT_field_symval
SPRUEM1–May2007VideoCapturePort79
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