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Constraint Manager for ispLSI Designs
Constraint Manager for ispLSI Designs
The ispLSI Constraint Manager lets you set pin, symbol, and net attributes for the
signals, the pins, and the symbols in your ispLSI designs. You can also read in an
existing Property File or save the attributes as a Property File.
Besides the Constraint Manager, you can still assign attributes directly to a source
file. For information on how to assign attributes in a source file such as a schematic or
an ABEL-HDL file, refer to Chapter 3, “Design Entry.”
The Constraint Manager consists of the Design Browser, a Pin Attributes Table, a Net
Attribute Table, and a Symbol Attributes Table.
If your EDIF design contains attributes, or if you read in an EDIF Property File when
you created your project, or if you set pin attributes using the Compiler Graphic User
Interface (GUI), those values display in the attribute tables. If you make changes to
the attribute tables, the new values are reflected in your project. You can create a
Property File by selecting the File ⇒ Save Property As menu item.
You can open an existing Property File by selecting the File ⇒ Open Property menu
item. The values from the Property File being opened are reflected in the property
tables. You can save changes to the open file using File ⇒ Save Property.
Main Window
Use the main Constraint Manager window to set attribute values for signals, the pins,
and the symbols.
To invoke the Constraint Manager:
1. Select the target ispLSI device from the Sources window of the Project Navigator.
2. In the Processes window, double click Constraint Manager. The main window of
the Constraint Manager appears (Figure 4-1).
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