Pulse Width Violation in TimeQuest Report

Description

The TimeQuest report may show minimum pulse width violation when you run full compilation on a soft-SERDES design.

Resolution

Specify the I/O standard for the clock pins so that the clock pins perform better and runs with a higher speed. For example, if you see pulse width violation on the rx_serial_clk and rx_serial_clk90 clock inputs, in the .qsf file add the following commands:

set_instance_assignment -name IO_STANDARD LVCMOS -to rx_serial_clk

set_instance_assignment -name IO_STANDARD LVCMOS -to rx_serial_clk90