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4.12.21VideoDisplayCounterReloadRegister(VDRELOAD)
VideoDisplayRegisters
Figure4-50.VideoDisplayField2VerticalSynchronizationEndRegister(VDVSYNE2)
31282716
ReservedVSYNCYSTOP2
R-0R/W-0
1512110
ReservedVSYNCXSTOP2
R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-25.VideoDisplayField2VerticalSynchronizationEndRegister(VDVSYNE2)Field
Descriptions
Bitfield
(1)
symval
(1)
ValueDescription
31-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
27-16VSYNCYSTOP2OF(value)0-FFFhSpecifiesthelinewhereVSYNCisde-assertedforfield2.
DEFAULT0
15-12Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothis
fieldhasnoeffect.
11-0VSYNCXSTOP2OF(value)0-FFFhSpecifiesthepixelwhereVSYNCisde-assertedinfield2.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDVSYNE2_field_symval
Whenexternalhorizontalorverticalsynchronizationareused,thevideodisplaycounterreloadregister
(VDRELOAD)determineswhatvaluesareloadedintothecounterswhenanexternalsyncisactivated.
Thevideodisplaycounterreloadregister(VDRELOAD)isshowninFigure4-51anddescribedin
Table4-26.
Figure4-51.VideoDisplayCounterReloadRegister(VDRELOAD)
31282716
ReservedVRLD
R-0R/W-0
1512110
CRLDHRLD
R/W-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-26.VideoDisplayCounterReloadRegister(VDRELOAD)FieldDescriptions
Bitfield
(1)
symval
(1)
ValueDescription
31-28Reserved-0Reserved.Thereservedbitlocationisalwaysreadas0.Avaluewrittentothisfield
hasnoeffect.
27-16VRLDOF(value)0-FFFhValueloadedintoframelinecounter(FLCOUNT)whenexternalVSYNCoccurs.
DEFAULT0
15-12CRLDOF(value)0-FhValueloadedintovideoclockcounter(VCCOUNT)whenexternalHSYNCoccurs.
DEFAULT0
11-0HRLDOF(value)0-FFFhValueloadedintoframepixelcounter(FPCOUNT)whenexternalHSYNCoccurs.
DEFAULT0
(1)
ForCSLimplementation,usethenotationVP_VDRELOAD_field_symval
SPRUEM1–May2007VideoDisplayPort141
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