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AR# 24257

11.3 System Generator for DSP - Why do I see an instantiated register called "xlpersistentdff" in my System Generator for DSP design?

Description

Why do I see an instantiated register called "xlpersistentdff" in my System Generator for DSP design?

Solution

The register is a persistent register which is placed in every design to make sure that there is at least one synchronous element present in every design. This register will be present in the top-level HDL file, but it is not part of the user design and can be safely ignored.

AR# 24257
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article