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

<!ATTLIST twDestClk twClkRes CDATA #IMPLIED>
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<!ELEMENT twPctRoute (#PCDATA)>
<!ELEMENT twNetRpt (twDelNet | twSlackNet | twSkewNet)>
<!ELEMENT twDelNet (twDel, twNet, twDetNet?)>
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<!ELEMENT twDetNet (twNetDel*)>
<!ELEMENT twNetDel (twSrc, twDest, twNetDelInfo)>
<!ELEMENT twNetDelInfo (#PCDATA)>
<!ATTLIST twNetDelInfo twAcc (twRouted | twEst | twApprox) "twRouted">
<!ELEMENT twDetSkewNet (twNetSkew*)>
<!ELEMENT twNetSkew (twSrc, twDest, twNetDelInfo, twSkew)>
<!ELEMENT twConstList (twConstListItem)*>
<!ELEMENT twConstListItem (twConstName, twNotMet?, twReqVal?, twActVal?, twLogLvls?)> 
<!ATTLIST twConstListItem twUnits (twTime | twFreq) "twTime">
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<!ELEMENT twReqVal (#PCDATA)>
<!ELEMENT twActVal (#PCDATA)>
<!ELEMENT twTimeGrp (twTimeGrpName, twCompList?, twSigList?, twBELList?, twMacList?, twPinList?)>
<!ELEMENT twTimeGrpName (#PCDATA)>
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<!ELEMENT twCompName (#PCDATA)>
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<!ELEMENT twSigName (#PCDATA)>
<!ELEMENT twBELList (twBELName+)>
<!ELEMENT twBELName (#PCDATA)>
<!ELEMENT twMacList (twMacName+)>
<!ELEMENT twMacName (#PCDATA)>
<!ELEMENT twPinList (twPinName+)>
<!ELEMENT twPinName (#PCDATA)>
<!ELEMENT twUnmetConstCnt (#PCDATA)>
<!ELEMENT twDataSheet (twSUH2ClkList*, twClk2PadList*, twClk2SUList*, twPad2PadList?)>
<!ATTLIST twDataSheet twNameLen CDATA #REQUIRED>
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<!ATTLIST twSU2ClkTime twEdge (twRising | twFalling | twIndet) #REQUIRED>
<!ELEMENT twH2ClkTime (#PCDATA)>
<!ATTLIST twH2ClkTime twEdge (twRising | twFalling | twIndet) #REQUIRED>
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<!ELEMENT twClk2Pad (twDest, twTime)>
<!ELEMENT twTime (#PCDATA)>
<!ATTLIST twTime twEdge (twRising | twFalling | twIndet) #REQUIRED>
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<!ELEMENT twFallFall (#PCDATA)>
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<!ELEMENT twPad2Pad (twSrc, twDest, twDel)>
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<!ELEMENT twScore (#PCDATA)>
<!ELEMENT twConstCov (twPathCnt, twNetCnt, twConnCnt, twPct)>
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<!ELEMENT twNetCnt (#PCDATA)>
<!ELEMENT twConnCnt (#PCDATA)>
<!ELEMENT twPct (#PCDATA)>
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<!ELEMENT twMaxFromToDel (#PCDATA)>
<!ELEMENT twMaxNetDel (#PCDATA)>
<!ELEMENT twMaxNetSkew (#PCDATA)>
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<!ELEMENT twMinInBeforeClk (#PCDATA)>
<!ELEMENT twMaxOutBeforeClk (#PCDATA)>
<!ELEMENT twMinOutAfterClk (#PCDATA)>
<!ELEMENT twFoot (twTimestamp)>
<!ELEMENT twTimestamp (#PCDATA)>
<!ELEMENT twClientInfo (twClientName, twAttrList?)>
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<!ELEMENT twAttrListItem (twName, twValue*)>
<!ELEMENT twName (#PCDATA)>
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]>
<twReport><twHead><twExecVer>Release 4.2i - Trace E.35</twExecVer><twCopyright>Copyright (c) 1995-2001 Xilinx, Inc.  All rights reserved.</twCopyright><twCmdLine>trce -e 3 -l 3 -xml tx2bit tx2bit.ncd -o tx2bit.twr tx2bit.pcf
</twCmdLine><twDesign>tx2bit.ncd</twDesign><twPCF>tx2bit.pcf</twPCF><twDevInfo><twDevName>xcv1000e</twDevName><twSpeedGrade>-6</twSpeedGrade><twSpeedVer>PRELIMINARY 1.65 2001-12-19</twSpeedVer></twDevInfo><twRptInfo twRptLvl="twErr"></twRptInfo></twHead><twBody><twErrRpt><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddra/qrise&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.385</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddra/qrise&quot; MAXSKEW = 50 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetSkew>0.000</twMaxNetSkew></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddra/qfall&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.364</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddra/qfall&quot; MAXSKEW = 50 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetSkew>0.000</twMaxNetSkew></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddra/crr&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.365</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddra/crf&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.237</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrb/qrise&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.237</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrb/qrise&quot; MAXSKEW = 50 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetSkew>0.000</twMaxNetSkew></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrb/qfall&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.234</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrb/qfall&quot; MAXSKEW = 50 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetSkew>0.000</twMaxNetSkew></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrb/crr&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.376</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrb/crf&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.364</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrc/qrise&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.361</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrc/qrise&quot; MAXSKEW = 50 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetSkew>0.000</twMaxNetSkew></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrc/crr&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.237</twMaxNetDel></twConstHead></twConst><twConst twConstType="twNetConst"><twConstHead><twConstName>NET &quot;ddrc/crf&quot; MAXDELAY = 600 pS  ;
</twConstName><twItemCnt>1</twItemCnt><twErrCnt>0</twErrCnt><twMaxNetDel>0.234</twMaxNetDel></twConstHead></twConst><twConst twConstType="twPathConst"><twConstHead><twConstName>TS_clk4x = PERIOD TIMEGRP &quot;clk4x&quot;  3.200 nS   HIGH 50.000000 % ;
</twConstName><twItemCnt>0</twItemCnt><twErrCnt>0</twErrCnt></twConstHead></twConst><twConst twConstType="twPathConst"><twConstHead><twConstName>TS_clk = PERIOD TIMEGRP &quot;clk&quot;  12.800 nS   HIGH 50.000000 % ;
</twConstName><twItemCnt>0</twItemCnt><twErrCnt>0</twErrCnt></twConstHead></twConst><twConst twConstType="twPathConst"><twConstHead><twConstName>TS_FST2FST = MAXDELAY FROM TIMEGRP &quot;FASTCLOCK&quot; TO TIMEGRP &quot;FASTCLOCK&quot; 3.800 nS ;
</twConstName><twItemCnt>37</twItemCnt><twErrCnt>0</twErrCnt><twMinPer>4.740</twMinPer><twMaxDel>2.955</twMaxDel></twConstHead></twConst><twConst twConstType="twPathConst"><twConstHead><twConstName>TS_FST2LAT = MAXDELAY FROM TIMEGRP &quot;FASTCLOCK&quot; TO TIMEGRP &quot;FASELATCH&quot; 3.800 nS ;
</twConstName><twItemCnt>0</twItemCnt><twErrCnt>0</twErrCnt></twConstHead></twConst><twConst twConstType="twPathConst"><twConstHead><twConstName>TS_LAT2LAT = MAXDELAY FROM TIMEGRP &quot;FASELATCH&quot; TO TIMEGRP &quot;FASELATCH&quot; 3.800 nS ;
</twConstName><twItemCnt>6</twItemCnt><twErrCnt>0</twErrCnt><twMinPer>4.688</twMinPer><twMaxDel>2.344</twMaxDel></twConstHead></twConst><twConst twConstType="twPathConst"><twConstHead><twConstName>TS_SLO2FST = MAXDELAY FROM TIMEGRP &quot;SLOWCLOCK&quot; TO TIMEGRP &quot;FASTCLOCK&quot; 8 nS  ; 
</twConstName><twItemCnt>2</twItemCnt><twErrCnt>0</twErrCnt><twMaxDel>2.292</twMaxDel></twConstHead></twConst><twUnmetConstCnt>0</twUnmetConstCnt><twDataSheet twNameLen="15"><twSUH2ClkList><twDest>clk4x</twDest><twSUH2Clk><twSrc>clk</twSrc><twSUHTime><twSU2ClkTime twEdge="twRising">2.292</twSU2ClkTime><twH2ClkTime twEdge="twRising">0.000</twH2ClkTime></twSUHTime></twSUH2Clk></twSUH2ClkList><twClk2SUList><twDest>clk4x</twDest><twClk2SU><twSrc>clk4x</twSrc><twRiseRise>2.955</twRiseRise><twFallRise>2.370</twFallRise><twRiseFall>2.344</twRiseFall><twFallFall>2.867</twFallFall></twClk2SU></twClk2SUList></twDataSheet></twErrRpt></twBody><twSum><twErrCnt>0</twErrCnt><twScore>0</twScore><twConstCov><twPathCnt>45</twPathCnt><twNetCnt>11</twNetCnt><twConnCnt>90</twConnCnt><twPct>87.378639</twPct></twConstCov><twStats><twMinPer>4.740</twMinPer><twMaxFreq>210.970</twMaxFreq><twMaxFromToDel>2.955</twMaxFromToDel><twMaxNetDel>0.385</twMaxNetDel></twStats></twSum><twFoot><twTimestamp>Sun Dec 15 15:41:47 2002</twTimestamp></twFoot></twReport>