Article ID: 000076581 Content Type: Troubleshooting Last Reviewed: 06/19/2020

Why is the rx_am_lock port in the 25G Ethernet Intel® FPGA IP always low when the channel is reconfigured to 10G?

Environment

  • Intel® Stratix® 10 SX SoC FPGA
  • Intel® Stratix® 10 MX FPGA
  • Intel® Stratix® 10 TX FPGA
  • Intel® Stratix® 10 GX FPGA
  • Intel® Quartus® Prime Pro Edition
  • 25G Ethernet Intel® FPGA IP
  • 25G 50G Ethernet
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    Description

    Due to the different architecture between 10G and 25G mode in the 25G Ethernet Intel® FPGA IP, after the channel has been reconfigured to 10G,  the port rx_am_lock does not behave the same as when the IP is operating in 25G mode.

    rx_am_lock will output constant 0 when the channel switches from 25G to 10G mode. 

    Resolution

    This problem is not scheduled to be fixed.

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