Article ID: 000084479 Content Type: Troubleshooting Last Reviewed: 09/26/2011

Cannot Edit ALTPLL Megafunction for Stratix V Devices

Environment

  • Quartus® II Subscription Edition
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT

    Critical Issue

    Description You cannot edit the ALTPLL megafunction with the parameter editor.

    This issue affects variations for Stratix V devices.

    There is no design impact.

    Resolution

    To work around this issue, manually modify the ALTPLL variation to the desired parameters. The only parameter that generally requires modification is the phase shift, which is currently set to a quarter clock period.

    This issue will be fixed in a future version of the POS-PHY Level 4 MegaCore function.

    Related Products

    This article applies to 1 products

    Stratix® V FPGAs

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