Using the popular, powerful, and easy-to-understand 68HC11 microprocessor as a representative example, this book provides a comprehensive introduction to the concepts, principles, and techniques of microprocessors and microprocessor based systems. Chapter topics include Number Systems and Codes, Digital Circuits, Memory Devices, Introduction to Computers, Microcomputer Structure and Operation, The Microprocessor: Heart of the Microcomputer, Programming the 68HC11 MPU, Input/Output Modes, and Input/Output Interfacing. For those interested in a career in electrical or computer engineering.