Article ID: 000078220 Content Type: Troubleshooting Last Reviewed: 07/27/2015

Why does the Fitter report show an incorrect "OCT_100ohms" receiver termination when external termination is used for Cyclone IV devices with Quartus II software versions 15.0 and earlier?

Environment

  • Cyclone® IV GX FPGA
  • Quartus® II Subscription Edition
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description

    Due to a problem in the Quartus® II software versions 15.0 and earlier, the Fitter will incorrectly report a termination of "OCT_100ohms" on Cyclone® IV GX device receiver input pins when it has been disabled in the Quartus II software.

    Resolution

    When disabled in the Quartus II software, the Fitter report\'s termination value is incorrect and can be ignored. The on-chip termination will disabled as intended.

    This problem is scheduled to be fixed in a future release of the Quartus II software.

    Disclaimer

    1

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