[L0-P05] Multiplexer - Introduction to Examples, About Multiplexer, Problem Solving 10min
module mux_demux(
input mux_2to1_sel,
output mux_2to1_out,
input [1:0] mux_4to1_sel,
output [1:0] mux_4to1_out,
input demux_1to2_sel,
input demux_1to2_in,
output reg [1:0] demux_1to2_out
);
//TODO
endmodule
Lecture materials
my Answer
module mux_demux(
input mux_2to1_sel,
output mux_2to1_out,
input [1:0] mux_4to1_sel,
output[1:0] mux_4to1_out,
input demux_1to2_sel,
input demux_1to2_in,
output reg [1:0] demux_1to2_out
);
assign mux_2to1_out = (mux_2to1_sel == 1'b0) ? (1'b1) : (1'b0);
assign mux_4to1_out = (mux_4to1_sel == 2'd0) ? (2'd3) :
(mux_4to1_sel == 2'd1) ? (2'd2) :
(mux_4to1_sel == 2'd2) ? (2'd1) : (2'd0);
always @(*) begin
if(demux_1to2_sel == 1'b0) begin
demux_1to2_out[0] <= demux_1to2_in;
demux_1to2_out[1] <= 1'b0;
end else begin
demux_1to2_out[0] <= 1'b0;
demux_1to2_out[1] <= demux_1to2_in;
end
end
endmodule