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VLSI: 4-2 Encoder Dataflow Modelling

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module Four_Two_Encoder(     input a0,     input a1,     input a2,     input a3,     output e0,     output e1,     output v     ); assign e0 = a1 | a3; assign e1 = a2 | a3; assign v = a0; endmodule
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VLSI: Encoder Gate Level Modelling

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module Encoder(d0,d1,d2,d3,d4,d5,d6,d7,a,b,c); input d0,d1,d2,d3,d4,d5,d6,d7; output a,b,c; or (a,d4,d5,d6,d7); or (b,d2,d3,d6,d7); or (c,d1,d3,d5,d7); endmodule
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Verilog: 8 to 1 Multiplexer (8-1 MUX) Dataflow Modelling with Testbench Code

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  Verilog Code for 8 to 1 Multiplexer Dataflow Modelling module mux_8to1(     input a, input b, input c, input D0, input D1, input D2, input D3, input D4, input D5, input D6, input D7, output out, ); module m81( output out, input D0, D1, D2, D3, D4, D5, D6, D7, S0, S1, S2); assign S1bar=~S1; assign S0bar=~S0; assign S2bar=~S2; assign out = (D0 & S2bar & S1bar & S0bar) | (D1 & S2bar & S1bar & S0) | (D2 & S2bar & S1 & S0bar) + (D3 & S2bar & S1 & S0) + (D4 & S2 & S1bar & S0bar) + (D5 & S2 & S1bar & S0) + (D6 & S2 & S1 & S0bar) + (D7 & S2 & S1 & S0); endmodule //Testbench code for 8-1 MUX Dataflow Modelling initial begin // Initialize Inputs a= 0;b = 0;c = 0;D0 = 1;D1 = 0;D2 = 0;D3 = 0;D4 = 0;D5 = 0;D6 = 0;D7 = 0; // Wait 100 ns for global reset to finish #100; // Add stimulus here #100; a = 0;b = 0;c = 1;d0 = ...
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VLSI: 1-4 DEMUX (Demultiplexer) Dataflow Modelling with Testbench

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Verilog Code for 1-4 DEMUX Dataflow Modelling module demux_1_to_4(     input d,     input s0,     input s1,     output y0,     output y1,     output y2,     output y3     ); assign s1n = ~ s1; assign s0n = ~ s0; assign y0 = d& s0n & s1n; assign y1 = d & s0 & s1n; assign y2 = d & s0n & s1; assign y3 = d & s0 & s1; endmodule //Testbench code for 1-4 DEMUX Dataflow Modelling initial begin                              // Initialize Inputs ...
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VLSI: 4-1 MUX Dataflow Modelling with Testbench

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Verilog Code for 4-1 MUX Dataflow Modelling module m41(out, i0, i1, i2, i3, s0, s1); output out; input i0, i1, i2, i3, s0, s1; assign y0 = (i0 & (~s0) & (~s1)); assign y1 = (i1 & (~s0) & s1); assign y2 = (i2 & s0 & (~s1)); assign y3 = (i3 & s0 & s1); assign out = (y0 | y1 | y2 | y3); endmodule //Testbench code for 4-1 MUX Dataflow Modelling initial begin                              // Initialize Inputs                              a = 1;b = 0;c = 0;d = 0;s0 = 0;s1 = 0;        ...
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VLSI: Half Subtractor and Full Subtractor Gate Level Modelling

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Half Subtractor: Verilog Module Code: module half_subtractor (      input  a,      input  b,      output  diff       output  borr ); wire x; xor (diff,a,b); not (x,a); and (borr,x,b); endmodule Full Subtractor: Verilog Module Code: module full_subtractor (      input  a,      input  b,      input  c,      output  diff       output  borr ); wire x,n2,z,n1; xor s1(x,a,b); not s3(n2,x); not s4(n1,c); and s5(y,n1,b); xor s2(diff,a,x); and s6(z,n2,a); or (borr,y,z); endmodule
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Full Subtractor Verilog Code in Structural/Gate Level Modelling with Testbench

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Verilog Code for Full Subtractor Structural/Gate Level Modelling module  full_sub(borrow,diff,a,b,c); output  borrow,diff; input  a,b,c; wire w1,w4,w5,w6; xor (diff,a,b,c); not n1(w1,a); and a1(w4,w1,b); and a2(w5,w1,c); and a3(w6,b,c); or o1(borrow,w4,w5,w6); endmodule //Testbench code for Full Subtractor Structural/Gate Level Modelling initial  begin // Initialize Inputs a = 0; b = 0; c = 0; // Wait 100 ns for global reset to finish #100; // Add stimulus here #100; a = 0;b = 0;c = 1; #100; a = 0;b = 1;c = 0; #100; a = 0;b = 1;c = 1; #100; a = 1;b = 0;c = 0; #100; a = 1;b = 0;c = 1; #100; a = 1;b = 1;c = 0; #100; a = 1;b = 1;c = 1; end Output: RTL Schematic: Full Subtractor Verilog Other Verilog Programs: Go to Index of  Verilog Programming
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