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  1. Xilinx - All Programmable
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  3. AR# 52831: Vivado Timing Analysis - Why is the set_input_delay without clock option ignored?

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 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