Article ID: 000082855 Content Type: Troubleshooting Last Reviewed: 09/11/2012

Why doesn't the ALTIOBUF megafunction generate output files when implementing dynamic output delay chains in Stratix V devices?

Environment

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

    Due to a problem in the Quartus® II software versions 11.0 and earlier, when targeting Stratix® V devices, the ALTIOBUF megafunction  is unable to create output files when implementing dynamic output delay chains if the output buffer dynamic delay chain1 or output buffer dynamic delay chain2 options are enabled.

    In the Quartus II software on Windows, you will see a clearbox.exe error.

    In the Quartus II software on Linux, you will see the following error message:

    "Fatal Error: Segment Violation at (nil) Module: qmegawiz"

    To work around this problem, set the output delay chains statically using the Assignment Editor.

    This problem is fixed beginning with the Quartus II software version 11.0 SP1.

    Related Products

    This article applies to 4 products

    Stratix® V GX FPGA
    Stratix® V E FPGA
    Stratix® V GT FPGA
    Stratix® V GS FPGA