Article ID: 000079313 Content Type: Troubleshooting Last Reviewed: 05/15/2013

Why is the afi_half_clk signal not constrained in my UniPHY-based memory controller?

Environment

  • Quartus® II Subscription Edition
    • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description Due to a problem in the Quartus® II software version 12.1 and later, UniPHY-based memory controllers are missing SDC constraints to properly constrain the afi_half_clk clock leading to incorrect timing analysis for the afi_half_clk clock domain.
    Resolution

    If the design is not using the afi_half_clk signal, no changes need to be made.

    If the design is using the afi_half_clk signal, add a create_generated_clock assignment for afi_half_clock to the top-level SDC file. If there is no top-level SDC file, create one and add it to the project file list.

    This issue will be fixed in a future version of the Quartus II software.

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    This article applies to 12 products

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