Why does Arria 10 Transceiver Toolkit (TTK) fail to find any PCIe transceiver links in Quartus Prime software 16.0? - Why does Arria 10 Transceiver Toolkit (TTK) fail to find any PCIe transceiver links in Quartus Prime software 16.0? Description Due to a problem in the Quartus® Prime version 16.0 software, you will see no transceiver links when you open TTK on a PCIe® interface. See this screenshot . This is due to missing clock connections for the PCIe module's Transceiver Reconfiguration Controller. Resolution To work around this issue, edit the instantiation <your design name> _altera_pcie_a10_hip_* of the Hard IP for PCI Express module and add the PCIe reference clock to the Transceiver Reconfiguration Controller connections as shown below. Replace <refclk_clk> below with the actual PCIe refclk signal used in your design. FROM : .xcvr_reconfig_clk (1'b0), ... .reconfig_pll0_clk (1'b0), ... .reconfig_pll1_clk (1'b0), TO : .xcvr_reconfig_clk (<refclk_clk>), ... .reconfig_pll0_clk (<refclk_clk>), ... .reconfig_pll1_clk (<refclk_clk>), This problem is scheduled to be fixed in a future version of the Quartus Prime software. Related Articles Why do I see the following message when attempting to start Transceiver Toolkit (TTK) in Quartus Prime software version 16.0? com.altera.debug.core SEVERE: TTK failed reading from PHY slave_ Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 16.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']