I think in Varyl tri keyword is used as a data type. On the other hand, in SystemVerilog the tri keyword is used to show that a declared element is a wire and to allow the element to have multiple drivers. Therefore, its usage is similar...
DS297 December 2, 2009 Product Specification www.xilinx.com 7 Tri-Mode Ethernet MAC v4.3 Interface Descriptions All ports of the core are internal connections in the FPGA fabric. An example HDL design, provided in both VHDL and Verilog, is delivered with each core. The example design connects...