Article ID: 000085675 Content Type: Troubleshooting Last Reviewed: 11/28/2011

Incorrect LVDS Frequencies in Quartus II Compilation for the POS-PHY Level 4 MegaCore Function

Environment

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

    Critical Issue

    Description

    For most of the data rates, the LVDS frequencies, which the Quartus II software reports after compilation in the Timequest Timing Analyzer under the Clocks section, are incorrect. Though, for some data rates (800 Mbps, 1000 Mbps, 1250 Mbps), the calculated frequencies are correct.

    Resolution

    To work around this issue, use only the 800-Mbps, 1,000-Mbps or 1,250-Mbps data rates.

    Related Products

    This article applies to 1 products

    Stratix® V FPGAs

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