Timing Constraints Spreadsheet

Timing Constraints Spreadsheet - 2022.2 English

Vivado Design Suite User Guide: Using Constraints (UG903)

Document ID

UG903

Release Date

2022-11-02

Version

2022.2 English

The timing constraints spreadsheet displays the details of all existing constraints of a specific type. Use the timing constraints spreadsheet to review and edit constraint options.

Figure 1. Timing Constraints Spreadsheet

The two last columns of the panel show:

Source File: The name of the XDC file or Tcl script the constraint comes from.
Scoped Cell: The name of the current instance when the constraint was applied. This name usually corresponds to an IP instance which is delivered with dedicated constraints. For more information, see Constraints Scoping.

A new constraint of the selected type can be created by double clicking the last line of the spreadsheet. The corresponding constraint creation dialog opens and lets you fill in the details of the new constraint. Click OK to apply the constraint in memory and close the window. A new line in the spreadsheet shows the new constraint information.

You can edit any existing constraint by modifying the values directly in the spreadsheet. After you have finished editing, click Apply to apply the modified constraints in memory.

Important: Applying a new or modified constraint does not save it in the XDC file. You must click Save Constraints to save it.

Important: IP constraints cannot be edited or deleted. In order to modify a constraint delivered with an IP, you must disable the corresponding IP XDC file, copy the constraint to your XDC file, and edit the constraint as desired.