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The Advanced tab window contains three major fields, each of which contains a number of buttons for opening different dialog boxes. The Grouping field is used for creating and modifying group constraints and timing THRU points. The Timing Constraints field is used for creating and modifying timing constraints for groups of elements. The Prorating Constraints field is used for specifying environmental operating conditions for a device.
Constraints created from the Advanced tab window take precedence over ones entered from the Global tab window. Between the Ports tab window and the Advanced tab window, the constraint entered last takes precedence.
The Advanced tab window is used to open dialog boxes for creating and manipulating constraints.
To open the Advanced tab window, click the Advanced tab on the main window.
To close the window, click the Global or Ports tab.
Figure 5.4 Advanced Tab Window| Field | Description |
|---|---|
| Create Group elements associated by Nets (TNM_NET) | Opens a dialog box for creating a time group composed of elements by nets (All Nets, Clock Nets, and Clock Enable Nets). See the “Group Elements Associated by Nets (TNM_NET)” section in the "Using the Constraints Editor" chapter. |
| Create Group elements by instance name (TNM) | Opens a dialog box from which you can create a new time name. See the “Group Elements by Instance Name (TNM)” section in the "Using the Constraints Editor" chapter. |
| Create Group elements by element output net name, schematic users (TIMEGRP) | Opens a dialog box from which you can create a time group composed of elements by output net name. See the “Group Elements by Element Output Net Name, Schematic Users (TIMEGRP)” section in the "Using the Constraints Editor" chapter. |
| Create Timing THRU Points (TPTHRU) | Opens a dialog box from which you can create a new TPTHRU constraint. See the “Timing THRU Points (TPTHRU)” section in the "Using the Constraints Editor" chapter. |
| Specify Pad to Setup Requirement(s) (OFFSET IN BEFORE) | Opens a dialog box from which you can create a Pad to Setup constraint. See the “Pad to Setup Requirement(s) for Groups of Pads and/or Registers (OFFSET IN BEFORE)” section in the "Using the Constraints Editor" chapter. |
| Specify Clock to Pad Requirement(s) (OFFSET OUT AFTER) | Opens a dialog box from which you can create a Clock to Pad constraint. See the “Clock to Pad Requirement(s) for Groups of Pads and/or Registers (OFFSET OUT AFTER)” section in the "Using the Constraints Editor" chapter. |
| Specify Slow/Fast Path Exceptions (FROM TO) | Opens a dialog box from which you can create an explicit time spec constraint specifying the maximum delay between groups of elements. See the “Slow/Fast Path Exceptions (FROM TO)” section in the "Using the Constraints Editor" chapter. |
| Specify Multicycle Paths (FROM TO) | Opens a dialog box from which you can create a time spec constraint which specifies the maximum delay between groups of elements and is relative to another time spec. See the “Multicycle Paths (FROM TO)” section in the "Using the Constraints Editor" chapter. |
| Specify False Paths (FROM TO TIG) | Opens a dialog box from which you can create a constraint that for timing purposes ignores specified paths. See the “False Paths (FROM TO TIG)” section in the "Using the Constraints Editor" chapter. |
| Specify False Paths by Nets (NET TIG) | Opens a dialog box from which you can create a constraint that for timing purposes ignores specified nets. See the “False Paths by Nets (NET TIG)” section in the "Using the Constraints Editor" chapter. |
| Specify Voltage | Opens a dialog box from which you can enter a voltage level. Voltages vary for different devices. |
| Specify Temperature | Opens a dialog box from which you can enter an operating temperature for the device. Temperatures vary for different devices. |