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AR# 4591

M1.5: NET PERIOD constraints are incorrectly interpreted by the Constraint Editor

Description

General Description: If a .ngd or .ucf file contain a period constraint written

using the following syntax they are not picked up by the Constraint Editor.

NET CLK PERIOD = 30 ns;

解决方案

Use the following syntax to resolve this issue:

NET "CLK" TNM_NET = "CLK"

TIMESPEC "CLK" = PERIOD "CLK" 30 ns;

This syntax will be picked up by the Constraint Editor.

AR# 4591
创建日期 08/31/2007
Last Updated 01/18/2010
状态 Archive
Type 综合文章