SDC File Overview

Generally, the steps you follow when creating a new SDC file are:

  1. Create an empty SDC file.
  2. Add the file to your project. (You can also add multiple files.)
  3. Have the <project>.pt.sdc and <project>.pt_timing.rpt files ready so you can use them when creating constraints.
  4. Identify clocks and their relationships.
  5. Identify I/O constraints.
  6. Identify any timing exceptions.
  7. Debug your SDC constraints.

The following sections go over these steps in detail with examples.