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AR# 14586

4.2isp2 Timing Analyzer - The timing report contains an incorrect cycle time for a 95144XL

描述

General Description:

The timing report produced by CPLDFit reports the cycle time for a clock net as "x" ns. When I run "Analyze Against Auto Generated Design Constraints" from Timing Analyzer, the Timing Analyzer reports a cycle time of "y" ns.

Which report is correct?

解决方案

The timing report is correct. (It appears that Tpta was not accounted for in the Timing Analyzer results.)

This issue was fixed in the 5.1i software release.

NOTE: Cycle-to-cycle = (Tcoi + Tf + Tlogi + Tsui + Tpta)

AR# 14586
日期 01/18/2010
状态 Archive
Type 综合文章
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