tx2bit.twx

以LVDS设计为例学习ISE中的时序分析以及低层布局器的使用方法 在底层布局器中对LVDS管脚进行约束的方法

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE twReport [
<!ELEMENT twReport (twHead, twWarn*, twBody, twSum, twFoot, twClientInfo?)>
<!ELEMENT twHead (twExecVer?, twCopyright, twCmdLine?, twDesign?, twPCF?, twDevInfo, twRptInfo)>
<!ELEMENT twExecVer (#PCDATA)>
<!ELEMENT twCopyright (#PCDATA)>
<!ELEMENT twCmdLine (#PCDATA)>
<!ELEMENT twDesign (#PCDATA)>
<!ELEMENT twPCF (#PCDATA)>
<!ELEMENT twDevInfo (twDevName, twSpeedGrade, twSpeedVer?)>
<!ELEMENT twDevName (#PCDATA)>
<!ELEMENT twSpeedGrade (#PCDATA)>
<!ELEMENT twSpeedVer (#PCDATA)>
<!ELEMENT twRptInfo (twItemLimit?, (twUnconst, twUnconstLimit?)?)>
<!ATTLIST twRptInfo twRptLvl (twErr | twVerbose | twTerseErr | twSum) #REQUIRED>
<!ATTLIST twRptInfo twTimeUnits (twPsec | twNsec | twUsec | twMsec | twSec) "twNsec">
<!ATTLIST twRptInfo twFreqUnits (twGHz | twMHz | twHz) "twMHz">
<!ELEMENT twItemLimit (#PCDATA)>
<!ELEMENT twUnconst EMPTY>
<!ELEMENT twUnconstLimit (#PCDATA)>
<!ELEMENT twWarn (#PCDATA)>
<!ELEMENT twBody (twDerating?, (twSumRpt | twVerboseRpt | twErrRpt | twTerseErrRpt), twNonDedClks?)>
<!ELEMENT twDerating (twProc?, twTemp?, twVolt?)>
<!ELEMENT twProc (#PCDATA)>
<!ELEMENT twTemp (#PCDATA)>
<!ELEMENT twVolt (#PCDATA)>
<!ELEMENT twSumRpt (twConstList, twUnmetConstCnt?, twDataSheet?)>
<!ELEMENT twErrRpt (twCycles?, (twConst | twTIG)*, twUnmetConstCnt?, twDataSheet?, twTimeGrp*)>
<!ELEMENT twTerseErrRpt (twConstList, twUnmetConstCnt?, twDataSheet?)>
<!ELEMENT twVerboseRpt (twCycles?, (twConst | twTIG)*, twUnmetConstCnt?, twDataSheet?, twTimeGrp*)>
<!ELEMENT twCycles (twSigConn+)>
<!ATTLIST twCycles twNum CDATA #REQUIRED>
<!ELEMENT twSigConn (twSig, twDriver, twLoad)>
<!ELEMENT twSig (#PCDATA)>
<!ELEMENT twDriver (#PCDATA)>
<!ELEMENT twLoad (#PCDATA)>
<!ELEMENT twConst (twConstHead, ((twPathRpt*,twRacePathRpt?) | twNetRpt*))>
<!ATTLIST twConst twConstType (twPathConst | twNetConst) "twPathConst">
<!ELEMENT twConstHead (twConstName, twItemCnt, twErrCnt, twMinPer?, twMaxDel?, twMaxFreq?, twMaxNetDel?, twMaxNetSkew?, twMinOff?, twMaxOff?)>
<!ELEMENT twConstName (#PCDATA)>
<!ELEMENT twItemCnt (#PCDATA)>
<!ELEMENT twErrCnt (#PCDATA)>
<!ELEMENT twMinPer (#PCDATA)>
<!ELEMENT twMaxDel (#PCDATA)>
<!ELEMENT twMaxFreq (#PCDATA)>
<!ELEMENT twMinOff (#PCDATA)>
<!ELEMENT twMaxOff (#PCDATA)>
<!ELEMENT twTIG (twTIGHead, (twPathRpt*,twRacePathRpt?))>
<!ELEMENT twTIGHead (twTIGName, twInstantiated, twBlocked)>
<!ELEMENT twTIGName (#PCDATA)>
<!ELEMENT twInstantiated (#PCDATA)>
<!ELEMENT twBlocked (#PCDATA)>
<!ELEMENT twRacePathRpt (twRacePath+)>
<!ELEMENT twPathRpt (twUnconstPath | twConstPath | twUnconstOffIn | twConstOffIn | twUnconstOffOut | twConstOffOut | twModOffOut)>
<!ELEMENT twUnconstPath (twTotDel, twSrc, twDest, (twDel, twSUTime)?, (twTotPathDel, twClkSkew)?, tw2Phase, twDetPath?)>
<!ELEMENT twTotDel (#PCDATA)>
<!ELEMENT twSrc (#PCDATA)>
<!ELEMENT twDest (#PCDATA)>
<!ELEMENT twDel (#PCDATA)>
<!ELEMENT twSUTime (#PCDATA)>
<!ELEMENT twTotPathDel (#PCDATA)>
<!ELEMENT twClkSkew (#PCDATA)>
<!ELEMENT twConstPath (twSlack, twSrc, twDest, (twTotPathDel, twClkSkew)?, twDelConst, tw2Phase?, twDetPath?)>
<!ELEMENT twSlack (#PCDATA)>
<!ELEMENT twDelConst (#PCDATA)>
<!ELEMENT tw2Phase EMPTY>
<!ELEMENT twRacePath (twSlack, twSrc, twDest, twClkSkew, twDetPath)>
<!ELEMENT twUnconstOffIn (twOff, twSrc, twDest, twGuaranteed?, (twDataPath, twClkPath)?)>
<!ELEMENT twOff (#PCDATA)>
<!ELEMENT twGuaranteed EMPTY>
<!ELEMENT twConstOffIn (twSlack, twSrc, twDest, ((twClkDel, twClkSrc, twClkDest) | twGuarInSetup), twOff, twOffSrc, twOffDest, (twDataPath, twClkPath)?)>
<!ELEMENT twClkDel (#PCDATA)>
<!ELEMENT twClkSrc (#PCDATA)>
<!ELEMENT twClkDest (#PCDATA)>
<!ELEMENT twGuarInSetup (#PCDATA)>
<!ELEMENT twOffSrc (#PCDATA)>
<!ELEMENT twOffDest (#PCDATA)>
<!ELEMENT twUnconstOffOut (twOff, twSrc, twDest, (twClkPath, twDataPath)?)>
<!ELEMENT twConstOffOut (twSlack, twSrc, twDest, twClkDel, twClkSrc, twClkDest, twDataDel, twDataSrc, twDataDest, twOff, twOffSrc, twOffDest, (twClkPath, twDataPath)?)>
<!ELEMENT twDataDel (#PCDATA)>
<!ELEMENT twDataSrc (#PCDATA)>
<!ELEMENT twDataDest (#PCDATA)>
<!ELEMENT twModOffOut (twSlack, twDest, twDataDel, twDataSrc, twDataDest, twDataPath?)>
<!ELEMENT twDetPath (twSrc, twDest, twLogLvls, twSrcSite, twSrcClk?, twPathDel*, (twLogDel, twRouteDel, twTotDel)?, twDestClk?, (twPctLog, twPctRoute)?)>
<!ELEMENT twDataPath (twSrc, twDest, twLogLvls, twSrcSite, twSrcClk?, twPathDel*, (twLogDel, twRouteDel, twTotDel)?, twDestClk?, (twPctLog, twPctRoute)?)>
<!ELEMENT twClkPath (twSrc, twDest, twLogLvls, twSrcSite, twSrcClk?, twPathDel*, (twLogDel, twRouteDel, twTotDel)?, twDestClk?, (twPctLog, twPctRoute)?)>
<!ELEMENT twLogLvls (#PCDATA)>
<!ELEMENT twSrcSite (#PCDATA)>
<!ELEMENT twSrcClk (#PCDATA)>
<!ATTLIST twSrcClk twEdge (twRising | twFalling) "twRising">
<!ATTLIST twSrcClk twArriveTime CDATA #IMPLIED>
<!ATTLIST twSrcClk twClkRes CDATA #IMPLIED>
<!ELEMENT twPathDel (twSite, twDelType, twFanCnt?, twDelInfo?, twComp, twNet?, twBEL*)>
<!ATTLIST twPathDel twHoldTime (TRUE | FALSE) "FALSE">
<!ELEMENT twDelInfo (#PCDATA)>
<!ATTLIST twDelInfo twEdge (twRising | twFalling | twIndet) #REQUIRED>
<!ATTLIST twDelInfo twAcc (twRouted | twEst | twApprox) "twRouted">
<!ELEMENT twSite (#PCDATA)>
<!ELEMENT twDelType (#PCDATA)>
<!ELEMENT twFanCnt (#PCDATA)>
<!ELEMENT twComp (#PCDATA)>
<!ELEMENT twNet (#PCDATA)>
<!ELEMENT twBEL (#PCDATA)>
<!ELEMENT twLogDel (#PCDATA)>
<!ELEMENT twRouteDel (#PCDATA)>
<!ELEMENT twDestClk (#PCDATA)>
<!ATTLIST twDestClk twEdge (twRising | twFalling) "twRising">
<!ATTLIST twDestClk twArriveTime CDATA #IMPLIED>