Verilog statement with the tristate value Z generates an error in PSoC Creator

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    Question: How to assign High Z state to a pin in Verilog?




    Any Verilog statement that includes the tristate value Z will generate an error when the design is built.




    For example:

      assign bidi = (state == 2'd0) ? 1'b0 : 1'bz;

    The solution is to replace the statement with a cy_bufoe component as follows:

      wire oe = (state == 2'd0);

      cy_bufoe buf_bidi (

        .x(1'b0), // (input) Value to send out

        .oe(oe),  // (input) Output Enable

        .y(bidi), // (inout) Connect to the actual bidirectional pin

        .yfb());  // (ouptut) Value on the pin brought back in