AR# 8682


3.1i - Constraints Editor - No I/O Standard available for clock signals


keywords: I/O, IO, standard, clock, signal

Urgency: Standard

General Description:
For Virtex, Virtex-E, and Spartan-II, the I/O STANDARD options for clocks in the "Ports" tab
field is still not available for clocks in this column.


The work-around is to manually modify the UCF file.

The following is an example of the correct syntax:


This change is available in the latest 3.1i Service Pack available at:
The first service pack containing the fix is Service Pack 2.
AR# 8682
Date 08/21/2002
Status Archive
Type General Article
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