As with the adder we described in the arithmetic circuit, we have a data output F and another output called Cout (Carry Out). In this case, we have two data inputs named A and B. Step 1: Describe the Serial Adder Using the State Diagram Define Inputs and Outputsīefore designing the state diagram, we always need to define the inputs and outputs first. To design such a circuit, you are going to use the state diagram as the mode of describing the behavior of the circuit, and then translate the state diagram into Verilog code. A serial adder is a circuit that performs binary addition bit by bit (i.e., instead of presenting both operands at the inputs of an adder at the same time, the operands are fed into the serial adder bit by bit and it generates the answer on the fly). In this tutorial, you are going to design a serial adder.
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