Article ID: 000084306 Content Type: Troubleshooting Last Reviewed: 01/14/2013

What is the mapping between the signal detect threshold voltage (Vth) and the setting in the Stratix IV GX ALTGX megawizard?

Environment

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

    The mapping between the signal detect threshold voltage (Vth) and the setting in the Stratix® IV GX ALTGX MegaWizard™ is detailed in the table below. 

    ALTGX SettingThreshold Voltage (Vth)
    850mV
    745mV
    640mV
    535mV
    430mV
    325mV
    220mV
    115mV

    The rx_signaldetect status signal will assert when the receiver peak-to-peak differential input voltage VID(p-p) is higher than Vth multiplied by 4.

    Resolution This information will be added to a future release of the Stratix IV handbook.

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