10.1: Unisims, Simprims- DCM simulation models do not work when the input clock has jitter

AR#	31399	Search For Another Answer
Topic	SW-Sim Libraries
Last Updated	07/28/2008
Status	Active

Description

Keywords: DCM, Unisim, Simprim, Spartan, DCM_SP

The clock output from DCM is irregular when the input clock to the DCM simulation model has jitter. Why?

Solution

This is a limitation with the simulation model only. Even though the input clock jitter is within the specification, DCM simulation model will not be able to handle the input clock jitter stimulus when "clkout_phase_shift " is set to Variable.