Cadence Q DRIVE SERIES Bedienungsanleitung PDF herunterladen (Seite 9)

As you can see this script generates a “report” and a “netlist” directory under

“synthesis” directory. It subsequently forms 3 files, timing.rpt, area.rpt and

hierarchy.rpt under “report” directory, and 1 file, my_design.net under “netlist”

directory.

(v) Generating the reports

To generate the timing reports, compile the report.tcl script by typing:

ac_shell> source report.tcl

Furthermore, run the script by typing:

ac_shell> report

Refer to Appendix B for more detail on the timing report.

(vi) View the reports

You can use the “Tcl” button on “ac_shell” window or a UNIX window to view the

timing.rpt.

Note that, by default the report lists the most critical path in the design.

In the timing.rpt, search for slack time. If it is a negative slack, it means a time violation.

Experiment by changing the clock period to avoid the timing violation if there is one.

Hint: Editing the timing constraint file, timing.tcl, can correct the violation.

Also view the area.rpt and hierarchy.rpt in the “report” directory along with

my_design.net in the “netlist” directory. Understand the contents of each file.

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Cadence Q DRIVE SERIES Bedienungsanleitung Seite 9