mux 4x1 verilog programme by using 2x1 test bench

This shows that if s1 is high, the (s0 ? d : c) block will be executed, else (s0 ? b : a) will be executed. assign out = s1 ? (s0 ? d : c) : (s0 ? b : a) This operator works similar to that of C programming language. A ternary operator ? is used here to implement the logic. Using the assign statement to express the logical expression of the circuit.

Start with the module and input-output declaration. s1.s0) Verilog code for 4×1 multiplexer using data flow modeling It is necessary to know the logical expression of the circuit to make a dataflow model. In Verilog, the assign statement is used in data-flow abstraction. It is described through the data flow through the combinational circuits rather than the logic gates used. The dataflow modeling represents the flow of the data. RTL schematic Gate-level modeling Data flow modeling It is clear that the gate-level modeling will give the exact involved hardware in the circuit of the system. Notice the resemblance between the logic circuit of 4:1 MUX and this picture. This hardware schematic is the RTL design of the circuit.

Similarly for the rest of the two gates and (T1, a, s0bar, s1bar), (T2, b, s0bar, s1), (T3, c, s0, s1bar), (T4, d, s0, s1) Here s0bar and s1bar are the output to the first and second NOT gate respectively and s0 and s1 are the input to the first and second NOT gate. Here’s how you would do it for the two NOT gates. Separate the list for a particular gate by appropriate brackets, if there exists more than one same logic gate. Time for us to write for the logic gates. Example: signals that are emerging from the NOT gate. Note that the intermediate signals are those that are not involved in the port list. The intermediate signals are declared as wires.

Mux 4x1 verilog programme by using 2x1 test bench