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📄 run2.twr

📁 该源码为xilinx ise教程的附带光盘源码
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Release 9.1i Trace 
Copyright (c) 1995-2006 Xilinx, Inc.  All rights reserved.

D:\Xilinx91i\bin\nt\trce.exe -v 10 D:/ise_book/Example-4-1/xplorer/run2.ncd -o
D:/ise_book/Example-4-1/xplorer/run2.twr
D:/ise_book/Example-4-1/xplorer/run2.pcf

Design file:              run2.ncd
Physical constraint file: run2.pcf
Device,package,speed:     xc3s400,pq208,-4 (PRODUCTION 1.39 2006-10-19)
Report level:             verbose report, limited to 10 items per constraint

Environment Variable      Effect 
--------------------      ------ 
NONE                      No environment variables were set
--------------------------------------------------------------------------------

INFO:Timing:2752 - To get complete path coverage, use the unconstrained paths 
   option. All paths that are not constrained will be reported in the 
   unconstrained paths section(s) of the report.
INFO:Timing:3339 - The clock-to-out numbers in this timing report are based on 
   a 50 Ohm transmission line loading model.  For the details of this model, 
   and for more information on accounting for different loading conditions, 
   please see the device datasheet.

================================================================================
Timing constraint: TS_clk = PERIOD TIMEGRP "clk" 5.45238095 ns HIGH 50%;

 1444 items analyzed, 4 timing errors detected. (4 setup errors, 0 hold errors)
 Minimum period is   5.653ns.
--------------------------------------------------------------------------------
Slack:                  -0.201ns (requirement - (data path - clock path skew + uncertainty))
  Source:               cnt_3 (FF)
  Destination:          cnt_37 (FF)
  Requirement:          5.452ns
  Data Path Delay:      5.653ns (Levels of Logic = 18)
  Clock Path Skew:      0.000ns
  Source Clock:         clk_BUFGP rising at 0.000ns
  Destination Clock:    clk_BUFGP rising at 5.452ns
  Clock Uncertainty:    0.000ns

  Maximum Data Path: cnt_3 to cnt_37
    Location             Delay type         Delay(ns)  Physical Resource
                                                       Logical Resource(s)
    -------------------------------------------------  -------------------
    SLICE_X50Y25.YQ      Tcko                  0.720   cnt<2>
                                                       cnt_3
    SLICE_X50Y25.G1      net (fanout=1)        0.912   cnt<3>
    SLICE_X50Y25.COUT    Topcyg                1.096   cnt<2>
                                                       Mcount_cnt_lut<3>
                                                       Mcount_cnt_cy<3>
    SLICE_X50Y26.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<3>
    SLICE_X50Y26.COUT    Tbyp                  0.120   cnt<4>
                                                       Mcount_cnt_cy<4>
                                                       Mcount_cnt_cy<5>
    SLICE_X50Y27.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<5>
    SLICE_X50Y27.COUT    Tbyp                  0.120   cnt<6>
                                                       Mcount_cnt_cy<6>
                                                       Mcount_cnt_cy<7>
    SLICE_X50Y28.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<7>
    SLICE_X50Y28.COUT    Tbyp                  0.120   cnt<8>
                                                       Mcount_cnt_cy<8>
                                                       Mcount_cnt_cy<9>
    SLICE_X50Y29.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<9>
    SLICE_X50Y29.COUT    Tbyp                  0.120   cnt<10>
                                                       Mcount_cnt_cy<10>
                                                       Mcount_cnt_cy<11>
    SLICE_X50Y30.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<11>
    SLICE_X50Y30.COUT    Tbyp                  0.120   cnt<12>
                                                       Mcount_cnt_cy<12>
                                                       Mcount_cnt_cy<13>
    SLICE_X50Y31.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<13>
    SLICE_X50Y31.COUT    Tbyp                  0.120   cnt<14>
                                                       Mcount_cnt_cy<14>
                                                       Mcount_cnt_cy<15>
    SLICE_X50Y32.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<15>
    SLICE_X50Y32.COUT    Tbyp                  0.120   cnt<16>
                                                       Mcount_cnt_cy<16>
                                                       Mcount_cnt_cy<17>
    SLICE_X50Y33.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<17>
    SLICE_X50Y33.COUT    Tbyp                  0.120   cnt<18>
                                                       Mcount_cnt_cy<18>
                                                       Mcount_cnt_cy<19>
    SLICE_X50Y34.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<19>
    SLICE_X50Y34.COUT    Tbyp                  0.120   cnt<20>
                                                       Mcount_cnt_cy<20>
                                                       Mcount_cnt_cy<21>
    SLICE_X50Y35.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<21>
    SLICE_X50Y35.COUT    Tbyp                  0.120   cnt<22>
                                                       Mcount_cnt_cy<22>
                                                       Mcount_cnt_cy<23>
    SLICE_X50Y36.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<23>
    SLICE_X50Y36.COUT    Tbyp                  0.120   cnt<24>
                                                       Mcount_cnt_cy<24>
                                                       Mcount_cnt_cy<25>
    SLICE_X50Y37.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<25>
    SLICE_X50Y37.COUT    Tbyp                  0.120   cnt<26>
                                                       Mcount_cnt_cy<26>
                                                       Mcount_cnt_cy<27>
    SLICE_X50Y38.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<27>
    SLICE_X50Y38.COUT    Tbyp                  0.120   cnt<28>
                                                       Mcount_cnt_cy<28>
                                                       Mcount_cnt_cy<29>
    SLICE_X50Y39.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<29>
    SLICE_X50Y39.COUT    Tbyp                  0.120   cnt<30>
                                                       Mcount_cnt_cy<30>
                                                       Mcount_cnt_cy<31>
    SLICE_X50Y40.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<31>
    SLICE_X50Y40.COUT    Tbyp                  0.120   cnt<32>
                                                       Mcount_cnt_cy<32>
                                                       Mcount_cnt_cy<33>
    SLICE_X50Y41.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<33>
    SLICE_X50Y41.COUT    Tbyp                  0.120   cnt<34>
                                                       Mcount_cnt_cy<34>
                                                       Mcount_cnt_cy<35>
    SLICE_X50Y42.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<35>
    SLICE_X50Y42.CLK     Tcinck                1.005   cnt<36>
                                                       Mcount_cnt_cy<36>
                                                       Mcount_cnt_xor<37>
                                                       cnt_37
    -------------------------------------------------  ---------------------------
    Total                                      5.653ns (4.741ns logic, 0.912ns route)
                                                       (83.9% logic, 16.1% route)

--------------------------------------------------------------------------------
Slack:                  -0.182ns (requirement - (data path - clock path skew + uncertainty))
  Source:               cnt_3 (FF)
  Destination:          cnt_36 (FF)
  Requirement:          5.452ns
  Data Path Delay:      5.634ns (Levels of Logic = 18)
  Clock Path Skew:      0.000ns
  Source Clock:         clk_BUFGP rising at 0.000ns
  Destination Clock:    clk_BUFGP rising at 5.452ns
  Clock Uncertainty:    0.000ns

  Maximum Data Path: cnt_3 to cnt_36
    Location             Delay type         Delay(ns)  Physical Resource
                                                       Logical Resource(s)
    -------------------------------------------------  -------------------
    SLICE_X50Y25.YQ      Tcko                  0.720   cnt<2>
                                                       cnt_3
    SLICE_X50Y25.G1      net (fanout=1)        0.912   cnt<3>
    SLICE_X50Y25.COUT    Topcyg                1.096   cnt<2>
                                                       Mcount_cnt_lut<3>
                                                       Mcount_cnt_cy<3>
    SLICE_X50Y26.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<3>
    SLICE_X50Y26.COUT    Tbyp                  0.120   cnt<4>
                                                       Mcount_cnt_cy<4>
                                                       Mcount_cnt_cy<5>
    SLICE_X50Y27.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<5>
    SLICE_X50Y27.COUT    Tbyp                  0.120   cnt<6>
                                                       Mcount_cnt_cy<6>
                                                       Mcount_cnt_cy<7>
    SLICE_X50Y28.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<7>
    SLICE_X50Y28.COUT    Tbyp                  0.120   cnt<8>
                                                       Mcount_cnt_cy<8>
                                                       Mcount_cnt_cy<9>
    SLICE_X50Y29.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<9>
    SLICE_X50Y29.COUT    Tbyp                  0.120   cnt<10>
                                                       Mcount_cnt_cy<10>
                                                       Mcount_cnt_cy<11>
    SLICE_X50Y30.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<11>
    SLICE_X50Y30.COUT    Tbyp                  0.120   cnt<12>
                                                       Mcount_cnt_cy<12>
                                                       Mcount_cnt_cy<13>
    SLICE_X50Y31.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<13>
    SLICE_X50Y31.COUT    Tbyp                  0.120   cnt<14>
                                                       Mcount_cnt_cy<14>
                                                       Mcount_cnt_cy<15>
    SLICE_X50Y32.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<15>
    SLICE_X50Y32.COUT    Tbyp                  0.120   cnt<16>
                                                       Mcount_cnt_cy<16>
                                                       Mcount_cnt_cy<17>
    SLICE_X50Y33.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<17>
    SLICE_X50Y33.COUT    Tbyp                  0.120   cnt<18>
                                                       Mcount_cnt_cy<18>
                                                       Mcount_cnt_cy<19>
    SLICE_X50Y34.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<19>
    SLICE_X50Y34.COUT    Tbyp                  0.120   cnt<20>
                                                       Mcount_cnt_cy<20>
                                                       Mcount_cnt_cy<21>
    SLICE_X50Y35.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<21>
    SLICE_X50Y35.COUT    Tbyp                  0.120   cnt<22>
                                                       Mcount_cnt_cy<22>
                                                       Mcount_cnt_cy<23>
    SLICE_X50Y36.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<23>
    SLICE_X50Y36.COUT    Tbyp                  0.120   cnt<24>
                                                       Mcount_cnt_cy<24>
                                                       Mcount_cnt_cy<25>
    SLICE_X50Y37.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<25>
    SLICE_X50Y37.COUT    Tbyp                  0.120   cnt<26>
                                                       Mcount_cnt_cy<26>
                                                       Mcount_cnt_cy<27>
    SLICE_X50Y38.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<27>
    SLICE_X50Y38.COUT    Tbyp                  0.120   cnt<28>
                                                       Mcount_cnt_cy<28>
                                                       Mcount_cnt_cy<29>
    SLICE_X50Y39.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<29>
    SLICE_X50Y39.COUT    Tbyp                  0.120   cnt<30>
                                                       Mcount_cnt_cy<30>

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