![]() The test bench code in Verilog for 4 Bit Adder using Full Adder is given below : `timescale 1ns / 1psĪdder_four_bit testadd(.sum(s).cout(cout).a(a). ![]() The test bench check that each combination of select lines connects the appropriate input to the output. The Verilog Code for the 4 Bit Adder using Full Adder is given below : RTL Design module adder_four_bit(įull_3 ad0(. The equations of the Full adder are :-Ĭout = (a and b ) or (b and cin ) or (cin and a ) = (a & b) | ( b & cin ) | ( cin & a ) Verilog Code for 4 Bit Adder using Full Adder The Full adder takes two inputs as ‘a’ and ‘b’ and ‘cin’ as the third input. The Full adder has been instantiated four times in the main module. In the below code, the we have used the Full adder for making a a 4 bit adder. It generates a 1 bit carry at the output. ![]() Full Adder in Dataflow model: Code: module fulladder ( input a, input b, input cin, output s, output cout ) assign sabcin assign cout (a & b) cin & (a b) endmodule Output: 2. 5) Frequently Asked Questions 4 Bit AdderĤ bit Adder is a digital circuit that has two four bit inputs and a 4 bit sum as output. Verilog full adder in dataflow & gate level modelling style.
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