Why does "link_up_tx" keep toggling on my Seriallite III core? - Why does "link_up_tx" keep toggling on my Seriallite III core? Description Due to a problem in the Quartus® Prime software version 16.1 and earlier, you may see "link_up_tx" toggling on your Seriallite III core, indicating that the link is not up. Resolution This problem has been fixed beginning with Quartus Prime software version 16.1.2. Custom Fields values: ['novalue'] Troubleshooting FB: 408781; False ['Serial Lite III Streaming Arria® 10 FPGA IP', 'Serial Lite III Streaming IP'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 16.1.2 16.0 ['Arria® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']