22.16.2 Generate Reports

The timing report enables you to quickly determine if any timing problems exist in your design. The timing report lists the following information:

• Delay from input I/O to output I/O (longest or shortest, depending on your Preferences).
• Delay from input I/O to internal registers (longest or shortest, depending on your Preferences).
• Delay from internal registers to output I/O (longest or shortest).
• Delays for each clock network (longest or shortest).
• Delays for interaction between clocks networks (longest or shortest).

To generate a timing report:

1. From the Tools menu, choose Report Paths. The Timing Report dialog appears. The External Setup-Hold Timing check box and the Slack Threshold text box are explained in the Timer Report dialog box section.
2. Click Options to specify more settings for your report. This displays the Preferences dialog box.
3. Verify your timing analysis preferences. Timer uses these preferences to generate your report.
   • Maximum List Size:
     1. Longest/Shortest Path(s) - Defines the number of paths to display in the report (default 1)
     2. Expanded Path(s) in List - Defines the number of expanded paths to display in the report (default is 15).
   • Sort By:
     1. Actual - Sort paths by actual delays.
     2. Slack - Sort paths by slack delays.

     This option is available only if you have entered timing constraints.

   • Case:Specifies your operating conditions, Best (0 degrees centigrade), Typical (25 degrees centigrade), and Worst (70 degrees centigrade).
   • Break Path at Register: The default timing paths break at all clock, gate, clear, and preset pins. Clear the check oxes in Break Path at Register to generate a timing report that displays paths that pass through (and do not “break”) at all Clock, Clear, Gate, and Present pins.

Once you are satisfied with your selections, click OK in the Preferences dialog box and then click OK in the Timing Report dialog box. The timing report is displayed in a separate widow.