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AR# 22095

Virtex-4, Architecture Wizard - Can I use a Virtex-4 DCM with a negative fixed phase without a work-around?

Description


Keyword: Phase, aligned, 13349, work around, workaround, clocking



Urgency : Standard



General Description:

I am instantiating a DCM using Architecture Wizard for a Virtex-4, and I receive a warning that negative fixed phase shift does not work. Is this true? What do I need to do?

Solution


Solution:

For a design targeting Virtex-4 DCM, this is a false warning and can be safely ignored. There are no additional steps needed to give the DCM a negative fixed phase shift. Architecture Wizard will instantiate your DCM with a negative phase shift.



Otherwise, refer to (Xilinx Answer 13349) for more information.
AR# 22095
Date Created 09/04/2007
Last Updated 09/01/2011
Status Archive
Type General Article