Why do I see don't-care port values during simulation of custom Platform Designer components when using the TERMINATION port property? - Why do I see don't-care port values during simulation of custom Platform Designer components when using the TERMINATION port property? Description Due to a problem in the Intel® Quartus® Prime Pro Edition Software v22.1, the HDL code generated by Platform Designer will not show the terminated input ports. For example, when the following settings are applied: add_sv_interface bus mem_ifc set_parameter_property my_interface_parameter SV_INTERFACE_PARAMETER bus set_port_property clk SV_INTERFACE_PORT bus set_port_property reset SV_INTERFACE_PORT bus set_port_property write_in SV_INTERFACE_SIGNAL bus set_port_property writedata_in SV_INTERFACE_SIGNAL bus set_port_property readdata_out SV_INTERFACE_SIGNAL bus set_port_property address_in TERMINATION true set_port_property readdatavalid_out TERMINATION true Platform Designer will generate the incorrect HDL code missing the two crossed out lines : mem_ifc #( .my_interface_parameter ("FOO") ) my_ip_0_bus ( .clk (clk), // input, width = 1, bus .reset (reset) // input, width = 1, bus ); my_ip my_ip_0 ( .bus (my_ip_0_bus) // interface, width = 1, mem_ifc.bus .address_in (10'b0000000000), // (terminated), . readdatavalid_out () // (terminated), ); assign my_ip_0_bus.writedata_in = writedata_in; assign readdata_out = my_ip_0_bus.readdata_out; assign my_ip_0_bus.write_in = write_in; assign address_in = 10'b0000000000; Resolution A patch is available to fix this problem for the Intel® Quartus® Prime Pro Edition Software version 22.1. Download and install Patch 0.12 from the appropriate link below Download patch 0.12 for Windows (.exe) Download patch 0.12 for Linux (.run) Download the Readme for patch 0.12 (.txt) This problem is fixed beginning with the Intel® Quartus® Prime Pro Edition Software version 22.2. Custom Fields values: ['novalue'] Troubleshooting 14016531211 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 22.2 22.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']