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AR# 12298

4.1i TRCE (Trace)/Timing Analyzer - The FROM:TO constraint does not take precedence over the NET OFFSET constraint

描述

General Description:

In my UCF file, the FROM:TO constraint is not taking precedence over the NET OFFSET constraint as it should.

解决方案

This occurs because the MAXDELAY constraint contains a superset of the offset constraint -- a strict intersection, as discussed in (Xilinx Answer 9297). Therefore, the precedence cannot be applied because the MAXDELAY constraint cannot be extracted from the offset constraint.

This will be fixed in the next major software release (after 5.1i).

AR# 12298
日期 01/18/2010
状态 Archive
Type 综合文章
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