Verilog code to implement a 4-bit demultiplexer circuit with enable.

Here’s an example Verilog code to implement a 4-bit demultiplexer circuit with enable:

module demux_with_enable (output reg [3:0] out0, output reg [3:0] out1, input [3:0] in, input enable, input select);

    always @(*) begin
        if (enable) begin
            if (select)
                out1 = in;
            else
                out0 = in;
        end
    end

endmodule

This code defines a module called “demux_with_enable” that implements a 4-bit demultiplexer with enable. The inputs “in” is a 4-bit input that represents the data to be demultiplexed. The outputs “out0” and “out1” are two 4-bit outputs that represent the demultiplexed data. The input “enable” is a 1-bit input that enables the demultiplexer. The input “select” is a 1-bit input that selects the output to which the input data is routed.

The “always” block is a combinational logic block that routes the input data to the selected output based on the value of the “enable” and “select” inputs. If “enable” is 1 and “select” is 0, the input data is routed to “out0”. If “enable” is 1 and “select” is 1, the input data is routed to “out1”. If “enable” is 0, the output values are held at their previous values.

Note that this Verilog code assumes that the “out0”, “out1”, and “in” signals are all 4-bit signals, and the “enable” and “select” inputs are 1-bit signals. If you want to use different signal widths, you would need to modify the code accordingly. Additionally, this code implements a combinational circuit, which means that the output is updated immediately whenever there is a change in the input signals. If you wanted to implement a registered circuit, you would need to modify the code accordingly.