To open the tutorial file:
Start Designer (from the Start menu, choose Designer) and open the tutorial design named Count16.adb from http://www.actel.com/custsup/onlinehelp/count16.adb.
Enter the following information in the Device Selection Wizard:
Die: APA075
Speed: STD
Die Voltage: 2.5 V
Package: 208 PQFP
Compile (click Compile, use the default Compile Options) and Layout (default options) your design. See the Compile and Layout sections of online help or Designer User's Guide for more information.
You are ready to create your clock constraints.