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1、ConstraintsGuideUG625(v11.4)December2,2009XilinxTrademarksandCopyrightInformationXilinxisdisclosingthisuserguide,manual,releasenote,and/orspecification(the“Documentation”)toyousolelyforuseinthedevelopmentofdesignstooperatewithXilinxhardwaredevices.Youmaynotreproduce,distribute,republish,download
2、,display,post,ortransmittheDocumentationinanyformorbyanymeansincluding,butnotlimitedto,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenconsentofXilinx.XilinxexpresslydisclaimsanyliabilityarisingoutofyouruseoftheDocumentation.Xilinxreservestheright,atitssolediscreti
3、on,tochangetheDocumentationwithoutnoticeatanytime.XilinxassumesnoobligationtocorrectanyerrorscontainedintheDocumentation,ortoadviseyouofanycorrectionsorupdates.XilinxexpresslydisclaimsanyliabilityinconnectionwithtechnicalsupportorassistancethatmaybeprovidedtoyouinconnectionwiththeInformation.THE
4、DOCUMENTATIONISDISCLOSEDTOYOU“AS-IS”WITHNOWARRANTYOFANYKIND.XILINXMAKESNOOTHERWARRANTIES,WHETHEREXPRESS,IMPLIED,ORSTATUTORY,REGARDINGTHEDOCUMENTATION,INCLUDINGANYWARRANTIESOFMERCHANTABILITY,FITNESSFORAPARTICULARPURPOSE,ORNONINFRINGEMENTOFTHIRD-PARTYRIGHTS.INNOEVENTWILLXILINXBELIABLEFORANYCONSEQU
5、ENTIAL,INDIRECT,EXEMPLARY,SPECIAL,ORINCIDENTALDAMAGES,INCLUDINGANYLOSSOFDATAORLOSTPROFITS,ARISINGFROMYOURUSEOFTHEDOCUMENTATION.©Copyright2002-2009XilinxInc.AllRightsReserved.XILINX,theXilinxlogo,theBrandWindowandotherdesignatedbrandsincludedhereinaretrademarksofXilinx,Inc.Allothertrademarksareth
6、epropertyoftheirrespectiveowners.ThePowerPCnameandlogoareregisteredtrademarksofIBMCorp.,andusedunderlicense.Allothertrademarksarethepropertyoftheirrespectiveowners.ConstraintsGuide2www.xilinx.comUG625(v11.4)December2,2009TableofContentsXilinxTrademarksandCopyrightInformation.....................
7、....................................................................2Chapter1AboutThisGuide........................................................................................................................13GuideConten
