UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 12019

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

描述

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?

解决方案

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
日期 01/18/2010
状态 Archive
Type 综合文章
的页面