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FPGA中IO时序约束分析.pdf

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Spartan-6FPGA SelectIOResources UserGuide UG381(v1.6)February14,2014 NoticeofDisclaimer Theinformationdisclosedtoyouhereunder(the“Materials”)isprovidedsolelyfortheselectionanduseofXilinxproducts.Tothemaximum extentpermittedbyapplicablelaw:(1)Materialsaremadeavailable"ASIS"andwithallfaults,XilinxherebyDISCLAIMSALL WARRANTIESANDCONDITIONS,EXPRESS,IMPLIED,ORSTATUTORY,INCLUDINGBUTNOTLIMITEDTOWARRANTIESOF MERCHANTABILITY,NON-INFRINGEMENT,ORFITNESSFORANYPARTICULARPURPOSE;and(2)Xilinxshallnotbeliable(whether incontractortort,includingnegligence,orunderanyothertheoryofliability)foranylossordamageofanykindornaturerelatedto,arising under,orinconnectionwith,theMaterials(includingyouruseoftheMaterials),includingforanydirect,indirect,special,incidental,or consequentiallossordamage(includinglossofdata,profits,goodwill,oranytypeoflossordamagesufferedasaresultofanyaction broughtbyathirdparty)evenifsuchdamageorlosswasreasonablyforeseeableorXilinxhadbeenadvisedofthepossibilityofthesame. XilinxassumesnoobligationtocorrectanyerrorscontainedintheMaterialsortonotifyyouofupdatestotheMaterialsortoproduct specifications.Youmaynotreproduce,modify,distribute,orpubliclydisplaytheMaterialswithoutpriorwrittenconsent.Certainproductsare subjecttothetermsandconditionsofXilinx’slimitedwarranty,pleaserefertoXilinx’sTermsofSalewhichcanbeviewedat www.xilinx.com/legal.htm#tos;IPcoresmaybesubjecttowarrantyandsupporttermscontainedinalicenseissuedtoyoubyXilinx.Xilinx productsarenotdesignedorintendedtobefail-safeorforuseinanyapplicationrequiringfail-safeperformance;youassumesoleriskand liabilityforuseofXilinxproductsinsuchcriticalapplications,pleaserefertoXilinx’sTermsofSalewhichcanbeviewedat www.xilinx.com/legal.htm#tos. AutomotiveApplicationsDisclaimer XILINXPRODUCTSARENOTDESIGNEDORINTENDEDTOBEFAIL-SAFE,ORFORUSEINANYAPPLICATIONREQUIRINGFAIL- SAFEPERFORMANCE,SUCHASAPPLICATIONSRELATEDTO:(I)THEDEPLOYMENTOFAIRBAGS,(II)CONTROLOFAVEHICLE, UNLESSTHEREISAFAIL-SAFEORREDUNDANCYFEATURE(WHICHDOESNOTINCLUDEUSEOFSO