21.9.12 Specifying Disable Timing Constraint

Use disable timing constraint to specify the timing arcs being disabled.

To specify the disable timing constraint:
  1. Add the constraint in the editable constraints grid or open the Set Constraint to Disable Timing Arcs dialog box using one of the following methods:
    • From the SmartTime Actions menu, choose Constraints > Disable Timing.
    • Click the þÿ icon.
    • Right-click Disable Timing in the Constraint Browser.
    • Double-click any field in the Disable Timing grid.
  2. Select an instance from your design.
  3. Select whether you want to exclude all timing arcs in the instance or if you want to specify the timing arc to exclude. If you selected specify timing arc to exclude, select a from and to port for the timing arc.
  4. Enter any comments to be attached to the constraint.
  5. Click OK. The new constraint appears in the constraints list.
Note: When you choose Commit from the File menu, SmartTime saves the newly-created constraint in the database.