2.4.2VideoPortStatusRegister(VPSTAT)
VideoPortControlRegisters
Thevideoportstatusregister(VPSTAT)indicatesthecurrentconditionofthevideoport.
Thevideoportstatusregister(VPSTAT)isshowninFigure2-2anddescribedinTable2-4.
Figure2-2.VideoPortStatusRegister(VPSTAT)
3116
Reserved
R-0
1543210
ReservedDCDISHIDATAReserved
R-0R-xR-xR-0
LEGEND:R=Readonly;-n=valueafterreset
Table2-4.VideoPortStatusRegister(VPSTAT)FieldDescriptions
Bitfield
(1)
symval
(1)
ValueDescription
31-4Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
3DCDISOF(value)Dual-channeldisablebit.Thedefaultvalueisdeterminedbythechip-level
configuration.
DEFAULT0Dual-channeloperationisenabled.
ENABLE
DISABLE1Portmuxingselectionspreventdual-channeloperation.
2HIDATAOF(value)Highdatabushalf.HIDATAdoesnotaffectvideoportoperationbutisprovidedto
informyouwhichVDATApinsmaybecontrolledbythevideoportGPIOregisters.
HIDATAisneversetunlessDCDISisalsoset.Thedefaultvalueisdeterminedbythe
chip-levelconfiguration.
DEFAULT0
NONE
USE1IndicatesthatanotherperipheralisusingVDATA[9-2]andthevideoportchannelA
(VDIN[9-2]orVDOUT[9-2])ismuxedontoVDATA[19-12].
1-0Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
(1)
ForCSLimplementation,usethenotationVP_VPSTAT_field_symval
SPRUEM1–May2007VideoPort37
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