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AR# 4910

M1.5: Timing Constraint Priority is being ignored for FROM:THRU:TO.

Description

General Description: In the M1.5 timing software the FROM:THRU:TO has the same priority as

the FROM:TO. This can cause the FROM:THRU:TO to be ignored when applying the

constraints. For example:

TIMESPEC TS_01 = FROM:FFS:THRU:NET:TO:FFS:20; has the same priority as

TIMESPEC TS_02 = FROM:FFS:TO:FFS:10; and TS02 could override TS_01.

Solution

To resolve this issue apply a priority to the FROM:THRU:TO constraint. For example:

TIMESPEC TS_01 = FROM:FFS:THRU:NET:TO:FFS:20:PRIORITY:1;

This is fixed in the next release, which is 2.1i

AR# 4910
Date Created 08/31/2007
Last Updated 01/18/2010
Status Archive
Type General Article