Article ID: 000080134 Content Type: Error Messages Last Reviewed: 08/03/2023

Error: Channel uncertainties must be greater than or equal to 0

Environment

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

    When you use the DDR3 SDRAM controller with UniPHY and follow the FPGA wiki page (Intel communities) Measuring_Channel_Signal_Integrity to calculate ISI parameters in the Board Settings tab of the DDR3 IP GUI, you may get a negative number. You will get the above error message if the negative number is entered into the GUI.

     

    Resolution

    To avoid the error message, enter zero if you calculate a negative number for ISI parameters.

     

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