AR# 12019


4.1i Timing/Constraint - Select line to BUFGMUX will not be covered with offset constraint


General Description:

When I place an OFFSET IN for the select line of a BUFGMUX, the setup time is ignored. How can I get around the OFFSET IN constraint that is not working on the select pin of the BUFTGMUX?


A FROM:TO constraint should be used instead.

Alternatively, the select line can be driven by a flip-flop or another synchronous element, placing the select line setup time into a PERIOD analysis.

AR# 12019
Date 01/18/2010
Status Archive
Type General Article
People Also Viewed