Verilog VHDL code Multiplexer and De Multiplexer
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The document describes Experiment 3 which aims to implement multiplexers and demultiplexers using Verilog code and gate-level modeling. It includes the theory of multiplexers and demultiplexers, truth tables for 4:1 and 2:1 multiplexers, and Verilog code examples to simulate a 4:1 multiplexer, 2:1 demultiplexer, and 4:1 decoder along with their corresponding RTL simulations and output waveforms.
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- 1. Experiment 3 Name: Shyamveer Singh Reg no:11205816 Rollno:B-54 AIM: To implement the multiplexer and demultiplexer with data flow and gate level molding. Appratus: Xilinx ISE 9.2i. Theory: Multiplexer: A multiplexer is a combinational digital logic switching device that has multiple inputs and one output. In addition to the input and output lines, the multiplexer has data select lines through which the data passed from an input line to the output line. Demultiplexer : A demultiplexer is a combinational digital logic switching device that has a single input line and multiple outputs. In addition to the input and output lines, the demultiplexer has data select lines through which the data passed from the input line to an output line is determined. Truth table: 4:1 Multiplexer: S0 S1 y 0 0 I0 0 1 I1 1 0 I2 1 1 I3 Multiplexer 2:1: Veriloge code: module muxtwo(a,b,s,y); input a,b,s; output y; assign y=((~s)&a)|(s&b); endmodule
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- 7. Implementation of demultiplexure 1:2; veriloge code: module demuxtwo(en,s0,s1,y0,y1); input en,s0,s1; output y0,y1; assign y0=en&(~s0); assign y1=en&s1; endmodule RTL simulation:
- 9. Implementation of Four to One Decoder: veriloge code: module demuxfour(en,s0,s1,y0,y1,y2,y3); input en,s0,s1; output y0,y1,y2,y3; wire w1,w2,w3,w4; not(w1,s0); not(w2,s1); not(w3,s0); not(w4,s1); and(y0,en,w1,w2); and(y1,en,w3,s1); and(y2,en,s0,w4); and(y3,en,s0,s1);
- 10. endmodule