Device and package information, device variations, and operating conditions are set when you import a netlist and compile a new design. However, you can change this information for existing designs.
To change device information for existing designs:
In the Tools menu, choose Device Selection. The Device Selection Wizard appears.
Select Die, Package, and Speed Grade and click Next. (You must select a die and package to continue.)
Select Device Variations and click Next.
Select Operating Conditions and click Finish.
Refer to the Actel FPGA Data Book or call your local Actel Sales Representative for information about device, package, speed grade, variations, and operating conditions.
When you change the device, some design information can be preserved depending on the type of change.
If you change the die from one technology to another, all information except timing is preserved. An example is changing an A1020A (1.2um) to an A1020B (1.0um) while keeping the package the same.
Constraint and pin information is preserved, when possible. An example is changing an A1240A in a PL84 package to an A1280A in a PL84 package.
When the package is changed (for the same device), the Repackager automatically attempts to preserve the existing pin and Layout information by mapping external pin names based on the physical bonding diagrams. This always works when changing from a smaller package to a larger package (or one of the same size). When changing to a smaller package, the Repackager determines if any of the currently assigned I/Os are mapped differently on the smaller package. If any of the I/Os are mapped differently, then the layout is invalidated and the unassigned pins identified.