n-bit adder X84292

Design a circuit that performs the addition of two $n$-bit numbers. The result must be represented in $n$ bits also. The number of bits $n$ must be a parameter of the module.

Specification

module adder (a, b, cin, sum, cout);
    parameter N=16;
    input [N-1:0] a, b;
    input cin;
    output [N-1:0] sum;
    output cout;

Hint

You may want to use several instances of a 1-bit full adder.

Input

• a and b are the two $n$-bit numbers.

• cin is the input carry.

Output

• sum is the $n$-bit output representing $(a+b) \textrm{~mod~} 2^n$.

• cout is the output carry.