Article ID: 000085648 Content Type: Troubleshooting Last Reviewed: 04/01/2013

Why does my Stratix IV dual-port RAM fail to compile when I convert it for a Stratix V design?

Environment

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

    Due to a problem in the Quartus® II software version 11.1 SP2 and earlier, the MegaWizard™ Plug-In Manager may generate an incorrect file if you convert a Stratix® IV memory to a Stratix V memory.  If your Stratix IV memory specified Old Data for mixed-port read-during-write behavior, the MegaWizard Plug-In Manager generates the Stratix V memory with the same option even though it is not supported in Stratix V devices. In Stratix V memory, only New Data is supported for mixed-port read-during-write behavior. The Quartus II software generates an error when compiling this memory with the unsupported option.

    Resolution

    To work around this problem, select the New Data option for mixed-port read-during-write behavior when regenerating Stratix IV memories for Stratix V devices.

    This problem is fixed beginning with the Quartus II software version 12.0.

    Related Products

    This article applies to 4 products

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

    Disclaimer

    1

    All postings and use of the content on this site are subject to Intel.com Terms of Use.