Modular design of a program control unit

Modular based design is used for flexibility, simplicity and to lower the cost and labor in designing general purpose or application specific digital circuits. This research investigates the nature and advantages of digital building blocks by implementing a modular based design, 8-bit Program control unit. The 8-bit Program Control Unit is designed using Logic Works 3.0.3, laid out using L-Edit(Version 7) and simulated in PSpice. This paper contains the design method, layout considerations and simulation results. It also discusses history, advantages and problems with digital building block.