Enhancing optimization and device portability by minimizing port pin count

Modern age electronic systems give highest speed and performance. Hardware optimization leads to reduction in board area, hardware, number of components and also the manufacturing cost of the electronic system. Optimization becomes severe in design of battery operated portable equipments. By using multifunctional input output port pins, device level optimization can be achieved. Higher optimization can be done at hardware level by wisely multiplexing and sharing the same port pins within different input output interface. Also the effective and best use of internal memory of processor or controller reduces interfacing complexity. By optimizing and reducing the input output port pin count we can select chips having less number of input output port pins. This can reduce PCB size. The port pin multiplexing and reusing may leads to software complexity. By making the trade-off between hardware and software complexity efficient system can be developed. With this, it is possible to share some of port pins between multiple input output interfaces. The proposed optimization technique is helpful in interface of multiple input keys, LEDs, sensors to single or less number of port pins. As well port pin requirement for display interfacing can be reduced. The proposed optimization techniques are used to reduce the pin count of controller used for single phase digital servo stabilizer.