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📄 run1.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/run1.ncd -o
D:/ise_book/Example-4-1/xplorer/run1.twr
D:/ise_book/Example-4-1/xplorer/run1.pcf

Design file:              run1.ncd
Physical constraint file: run1.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" 7.321 ns HIGH 50%;

 1444 items analyzed, 0 timing errors detected. (0 setup errors, 0 hold errors)
 Minimum period is   5.725ns.
--------------------------------------------------------------------------------
Slack:                  1.596ns (requirement - (data path - clock path skew + uncertainty))
  Source:               cnt_3 (FF)
  Destination:          cnt_37 (FF)
  Requirement:          7.321ns
  Data Path Delay:      5.707ns (Levels of Logic = 18)
  Clock Path Skew:      -0.018ns
  Source Clock:         clk_BUFGP rising at 0.000ns
  Destination Clock:    clk_BUFGP rising at 7.321ns
  Clock Uncertainty:    0.000ns

  Maximum Data Path: cnt_3 to cnt_37
    Location             Delay type         Delay(ns)  Physical Resource
                                                       Logical Resource(s)
    -------------------------------------------------  -------------------
    SLICE_X54Y13.YQ      Tcko                  0.720   cnt<2>
                                                       cnt_3
    SLICE_X54Y13.G1      net (fanout=1)        0.966   cnt<3>
    SLICE_X54Y13.COUT    Topcyg                1.096   cnt<2>
                                                       Mcount_cnt_lut<3>
                                                       Mcount_cnt_cy<3>
    SLICE_X54Y14.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<3>
    SLICE_X54Y14.COUT    Tbyp                  0.120   cnt<4>
                                                       Mcount_cnt_cy<4>
                                                       Mcount_cnt_cy<5>
    SLICE_X54Y15.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<5>
    SLICE_X54Y15.COUT    Tbyp                  0.120   cnt<6>
                                                       Mcount_cnt_cy<6>
                                                       Mcount_cnt_cy<7>
    SLICE_X54Y16.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<7>
    SLICE_X54Y16.COUT    Tbyp                  0.120   cnt<8>
                                                       Mcount_cnt_cy<8>
                                                       Mcount_cnt_cy<9>
    SLICE_X54Y17.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<9>
    SLICE_X54Y17.COUT    Tbyp                  0.120   cnt<10>
                                                       Mcount_cnt_cy<10>
                                                       Mcount_cnt_cy<11>
    SLICE_X54Y18.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<11>
    SLICE_X54Y18.COUT    Tbyp                  0.120   cnt<12>
                                                       Mcount_cnt_cy<12>
                                                       Mcount_cnt_cy<13>
    SLICE_X54Y19.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<13>
    SLICE_X54Y19.COUT    Tbyp                  0.120   cnt<14>
                                                       Mcount_cnt_cy<14>
                                                       Mcount_cnt_cy<15>
    SLICE_X54Y20.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<15>
    SLICE_X54Y20.COUT    Tbyp                  0.120   cnt<16>
                                                       Mcount_cnt_cy<16>
                                                       Mcount_cnt_cy<17>
    SLICE_X54Y21.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<17>
    SLICE_X54Y21.COUT    Tbyp                  0.120   cnt<18>
                                                       Mcount_cnt_cy<18>
                                                       Mcount_cnt_cy<19>
    SLICE_X54Y22.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<19>
    SLICE_X54Y22.COUT    Tbyp                  0.120   cnt<20>
                                                       Mcount_cnt_cy<20>
                                                       Mcount_cnt_cy<21>
    SLICE_X54Y23.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<21>
    SLICE_X54Y23.COUT    Tbyp                  0.120   cnt<22>
                                                       Mcount_cnt_cy<22>
                                                       Mcount_cnt_cy<23>
    SLICE_X54Y24.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<23>
    SLICE_X54Y24.COUT    Tbyp                  0.120   cnt<24>
                                                       Mcount_cnt_cy<24>
                                                       Mcount_cnt_cy<25>
    SLICE_X54Y25.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<25>
    SLICE_X54Y25.COUT    Tbyp                  0.120   cnt<26>
                                                       Mcount_cnt_cy<26>
                                                       Mcount_cnt_cy<27>
    SLICE_X54Y26.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<27>
    SLICE_X54Y26.COUT    Tbyp                  0.120   cnt<28>
                                                       Mcount_cnt_cy<28>
                                                       Mcount_cnt_cy<29>
    SLICE_X54Y27.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<29>
    SLICE_X54Y27.COUT    Tbyp                  0.120   cnt<30>
                                                       Mcount_cnt_cy<30>
                                                       Mcount_cnt_cy<31>
    SLICE_X54Y28.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<31>
    SLICE_X54Y28.COUT    Tbyp                  0.120   cnt<32>
                                                       Mcount_cnt_cy<32>
                                                       Mcount_cnt_cy<33>
    SLICE_X54Y29.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<33>
    SLICE_X54Y29.COUT    Tbyp                  0.120   cnt<34>
                                                       Mcount_cnt_cy<34>
                                                       Mcount_cnt_cy<35>
    SLICE_X54Y30.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<35>
    SLICE_X54Y30.CLK     Tcinck                1.005   cnt<36>
                                                       Mcount_cnt_cy<36>
                                                       Mcount_cnt_xor<37>
                                                       cnt_37
    -------------------------------------------------  ---------------------------
    Total                                      5.707ns (4.741ns logic, 0.966ns route)
                                                       (83.1% logic, 16.9% route)

--------------------------------------------------------------------------------
Slack:                  1.615ns (requirement - (data path - clock path skew + uncertainty))
  Source:               cnt_3 (FF)
  Destination:          cnt_36 (FF)
  Requirement:          7.321ns
  Data Path Delay:      5.688ns (Levels of Logic = 18)
  Clock Path Skew:      -0.018ns
  Source Clock:         clk_BUFGP rising at 0.000ns
  Destination Clock:    clk_BUFGP rising at 7.321ns
  Clock Uncertainty:    0.000ns

  Maximum Data Path: cnt_3 to cnt_36
    Location             Delay type         Delay(ns)  Physical Resource
                                                       Logical Resource(s)
    -------------------------------------------------  -------------------
    SLICE_X54Y13.YQ      Tcko                  0.720   cnt<2>
                                                       cnt_3
    SLICE_X54Y13.G1      net (fanout=1)        0.966   cnt<3>
    SLICE_X54Y13.COUT    Topcyg                1.096   cnt<2>
                                                       Mcount_cnt_lut<3>
                                                       Mcount_cnt_cy<3>
    SLICE_X54Y14.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<3>
    SLICE_X54Y14.COUT    Tbyp                  0.120   cnt<4>
                                                       Mcount_cnt_cy<4>
                                                       Mcount_cnt_cy<5>
    SLICE_X54Y15.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<5>
    SLICE_X54Y15.COUT    Tbyp                  0.120   cnt<6>
                                                       Mcount_cnt_cy<6>
                                                       Mcount_cnt_cy<7>
    SLICE_X54Y16.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<7>
    SLICE_X54Y16.COUT    Tbyp                  0.120   cnt<8>
                                                       Mcount_cnt_cy<8>
                                                       Mcount_cnt_cy<9>
    SLICE_X54Y17.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<9>
    SLICE_X54Y17.COUT    Tbyp                  0.120   cnt<10>
                                                       Mcount_cnt_cy<10>
                                                       Mcount_cnt_cy<11>
    SLICE_X54Y18.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<11>
    SLICE_X54Y18.COUT    Tbyp                  0.120   cnt<12>
                                                       Mcount_cnt_cy<12>
                                                       Mcount_cnt_cy<13>
    SLICE_X54Y19.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<13>
    SLICE_X54Y19.COUT    Tbyp                  0.120   cnt<14>
                                                       Mcount_cnt_cy<14>
                                                       Mcount_cnt_cy<15>
    SLICE_X54Y20.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<15>
    SLICE_X54Y20.COUT    Tbyp                  0.120   cnt<16>
                                                       Mcount_cnt_cy<16>
                                                       Mcount_cnt_cy<17>
    SLICE_X54Y21.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<17>
    SLICE_X54Y21.COUT    Tbyp                  0.120   cnt<18>
                                                       Mcount_cnt_cy<18>
                                                       Mcount_cnt_cy<19>
    SLICE_X54Y22.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<19>
    SLICE_X54Y22.COUT    Tbyp                  0.120   cnt<20>
                                                       Mcount_cnt_cy<20>
                                                       Mcount_cnt_cy<21>
    SLICE_X54Y23.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<21>
    SLICE_X54Y23.COUT    Tbyp                  0.120   cnt<22>
                                                       Mcount_cnt_cy<22>
                                                       Mcount_cnt_cy<23>
    SLICE_X54Y24.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<23>
    SLICE_X54Y24.COUT    Tbyp                  0.120   cnt<24>
                                                       Mcount_cnt_cy<24>
                                                       Mcount_cnt_cy<25>
    SLICE_X54Y25.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<25>
    SLICE_X54Y25.COUT    Tbyp                  0.120   cnt<26>
                                                       Mcount_cnt_cy<26>
                                                       Mcount_cnt_cy<27>
    SLICE_X54Y26.CIN     net (fanout=1)        0.000   Mcount_cnt_cy<27>
    SLICE_X54Y26.COUT    Tbyp                  0.120   cnt<28>
                                                       Mcount_cnt_cy<28>
                                                       Mcount_cnt_cy<29>

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