1. Hardware Description Languages Drawing of circuit schematics is not practical for circuits containing more than few tens of gates. We need a way to just describe the circuit itself – what are the inputs and outputs, what components exist, and what are the connections.

2. Combinatorial Logic VHDL

3. VHDL supports the ability to describe the internals of a design as behavior rather than as a circuit.

4. Sequential Logic ResisterOscillator

5. Controller

6. RTL Design Using VHDL

7. The design process for today's billion-transistor digital systems becomes a more programming based process than before and programming skills are important! Different HDLs VHDL Verilog SystemC Modern digital design relies heavily on the use of HDLs at all stages of design.