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)  mod  2ⁿ.
• cout is the output carry.