vesa-计算

VESACOORDINATEDVIDEOTIMINGGENERATORApril9,2003Revision1.1DevelopedByGrahamLoveridgeREVISIONHISTORY:Apr7,2003:Rev1.11)Reducedblankingverticalbackporcherrorcorrectedtogive3linesinsteadof2Mar26,2003:Rev1.01)BasedonGTFspreadsheetr1v1developedbyAndyMorrish.Comments,bugs,callGrahamLoveridgeat408934-4394orfax(408)[e-mail]1,024PIXELSVERPIXELS768LINESHORFREQUENCY47.297kHzACTUALVERFREQUENCY59.870HzPIXELCLOCK56.000MHz1PIXELSCHARACTERWIDTH142.857ns8PIXELSSCANTYPENON-INTASPECTRATIO4:3HSYNCPOLARITYPOSITIVEVSYNCPOLARITYNEGATIVEHORTOTAL21.143us148CHARS1,184PIXELSHORADDR18.286us128CHARS1,024PIXELSHORBLANK2.857us20CHARS160PIXELSHORBLANK+MARGIN2.857us20CHARS160PIXELSPREDICTEDHBLANKDUTYCYCLE23.669%(fromGTFblankingformula)ACTUALHORBLANKDUTYCYCLE13.514%ACT.HORBLNK+MARGINDUTYCYCLE13.514%HLEFTMARGIN0.000us0CHARS0PIXELSHFRONTPORCH0.857us6CHARS48PIXELSHORSYNC0.571us4CHARS32PIXELSHBACKPORCH1.429us10CHARS80PIXELSHRIGHTMARGIN0.000us0CHARS0PIXELSVERTOTAL16.703ms790.0LINESVERADDR16.238ms768.0LINESVERBLANK0.465ms22.0LINESVTOPMARGIN0.000us0.0LINESVFRONTPORCH63.429us3.0LINESVERSYNC84.571us4.0LINESVBACKPORCH317.143us15.0LINESVBOTTOMMARGIN0.000us0.0LINESVESACVTName:0.79M3-RFormat:1024x768@60Hz-ReducedBlankingVESACoordinatedVideoTimingGenerator(c)Copyright2002VideoElectronicsStandardsAssociation