Article ID: 000090195 Content Type: Troubleshooting Last Reviewed: 04/14/2022

Why are the timestamp data outputs for HPS EMAC1 and HPS EMAC2 swapped when routed over to the fabric on the Intel® Arria®10 SX SoC devices?

Environment

  • Intel® Quartus® Prime Pro Edition
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description

    Due to a design problem with the HPS EMAC 1 and HPS EMAC 2, the timestamp data output signals will not show data when enabling the Precision Time Protocol(PTP). This happens when using the Intel® Quartus® Prime Pro Edition Software version 17.1 and later, the behavior will occur as follows:

    • HPS EMAC1 timestamp data output (a10_hps_emac1_ptp_tstmp_data) shows up on HPS EMAC2 timestamp data output signal (a10_hps_emac2_ptp_tstmp_data).
    • HPS EMAC2 timestamp data output (a10_hps_emac2_ptp_tstmp_data) shows up on HPS EMAC1 timestamp data output signal (a10_hps_emac1_ptp_tstmp_data).
    • HPS EMAC0 is not affected.
    Resolution

    To work around this problem:

    • When enabling EMAC1 in the system, whether connected to the HPS IO or to the FPGA, and you want to use PTP timestamp data for EMAC1 in the FPGA fabric, you must enable EMAC2 PTP FPGA Interface and export and use the HPS EMAC2 timestamp data output signal (a10_hps_emac2_ptp_tstmp_data) within the fabric, to get the true timestamp data associated with EMAC1.
    • When enabling EMAC2 in the system, whether connected to the HPS IO or to the FPGA, and you want to use PTP timestamp data for EMAC2 in the FPGA fabric, you must enable EMAC1 PTP FPGA Interface and export and use the HPS EMAC1 timestamp data output signal (a10_hps_emac1_ptp_tstmp_data) within the fabric, to get the true timestamp data associated with EMAC2.

     

    This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition Software and Standard version.

    Related Products

    This article applies to 1 products

    Intel® Arria® 10 SX SoC FPGA

    Disclaimer

    1

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