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718
FPCOUNT
HBLNK
HSYNC
719 720 735 736 799 800 857 0 1
FPCOUNT = HBLNKSTART
FPCOUNT = HBLNKSTOP
FPCOUNT = HSYNCSTOP
FPCOUNT = HSYNCSTART
FLCOUNT
VBLNK
VSYNC
FLCOUNT = VSYNCYSTOP1
FPCOUNT = VSYNCXSTOP1
263
264
265
18
19
20
5
6
7
266
282
283
284
524
525
1
2
3
4
5
267
268
269
270
FLD
FLCOUNT = VBLNKYSTOP1
FPCOUNT = VBLNKXSTOP1
FLCOUNT = VBLNKYSTART2
FPCOUNT = VBLNKXSTART2
FLCOUNT = VBLNKYSTOP2
FPCOUNT = VBLNKXSTOP2
FLCOUNT = VBLNKYSTART1
FPCOUNT = VBLNKXSTART1
FLCOUNT = VSYNCYSTART2
FPCOUNT = VSYNCXSTART2
FLCOUNT = VSYNCYSTART1
FPCOUNT = VSYNCXSTART1
FLCOUNT = VSYNCYSTOP2
FPCOUNT = VSYNCXSTOP2
FLCOUNT = FLD2YSTART
FPCOUNT = FLD2XSTART
FLCOUNT = FLD1YSTART
FPCOUNT = FLD1XSTART
One Frame
One Line
Field 2
Field 1
VideoDisplayModeSelection
Figure4-5showshowthehorizontalblankingandhorizontalsynchronizationsignalsaretriggered.
(HBLNKandHSYNCareshownactivehigh).
Figure4-5.HorizontalBlankingandHorizontalSyncTiming
The12-bitFLCOUNTcountswhichscanlineisbeinggenerated.TheFLCOUNTisresetto1after
reachingthecountspecifiedinVDFRMSZ.(ForBT.656operation,theFRMHIGHTwouldbesetto525
(525/60operation)or625(625/50operation).)ThestateofFLCOUNTisreflectedintheVDYPOSbitsof
VDSTAT.Figure4-6showshowtheverticalblanking,verticalsynchronization,andfieldidentification
signalsaretriggered.(VBLNKandVSYNCareshownactivehigh.)
Notethatthesignalscantransitionatanyplacealongthevideoline(specifiedbytheXSTARTand
XSTOPbitsoftheappropriateregisters).Inthiscase,VBLNKstartsathorizontalcountVBLNKXSTART2
=429onscanlineVBLNKYSTART2=263(565/60operation).
Figure4-6.VerticalBlanking,SyncandEven/OddFrameSignalTiming
SPRUEM1–May2007VideoDisplayPort97
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