Level 2 - Design of an 8bit+8bit BCD Adder

You task is to design an BCD adder, that adds two two-digit BCD numbers. The structure of a

4bit BCD adder is as follows:

carry out

Sum > 9?

carry out

binary

adder

binary

adder

Sum

carry in t

• Design your BCD adder in VHDL; this must be structural for the top-level

• Simulate your design and show correct behaviour; the input and output vectors

must be shown in decimal

Your submission must include the following:

• ALL VHDL sources

• All simulation screenshots