21.7.3.4 Specific Clock Constraints

Figure 21-20. Constraint Wizard – Specific Clock Constraints
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In this window you can set a period and I/O timing constraints for a specific clock domain. All I/Os within the domain will be affected by the I/O timing constraints. You can modify the constraints from the grid.

To add a constraint for a potential clock:
  1. Click the first row in the grid, enter the constraint information, and click the green check mark.
  2. Click Next to go to the next step or Finish to exit the wizard.
Note: This option is available only when there is a potential clock in your design.