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AR# 15126

7.1i Timing - Negative external hold times are rounded to 0 (zero) for a Virtex-E device

Description

General Description:

When I manually calculate the external hold time for my Virtex-E device, a negative hold time value is reported. However, the timing analysis rounds all of my negative hold times to zero.

Solution

The external negative hold times are more optimistic than they should be.

AR# 15126
Date 01/18/2010
Status Archive
Type General Article