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# 52831

Vivado Timing Analysis - Why is the set_input_delay without clock option ignored?

Description

Why is the set_input_delay command ignored?

I have used the set_input_delay command without the -clock option, but it appears that the command is ignored.

I receive the following warning:

CRITICAL WARNING: [Constraints 18-449] set_input_delay: No clock objects specified for -clock option, set_input_delay without -clock option will constrain the pin/port with a virtual clock.

Solution

The set_input_delay command requires the -clock option.
AR# 52831
Date Created 11/08/2012
Last Updated 10/20/2014
Status Active
Type Known Issues
Tools
  • Vivado Design Suite - 2012.3
  • Vivado Design Suite - 2012.4
  • Vivado Design Suite - 2013.1
  • Vivado Design Suite - 2013.2