This updated edition continues to provide readers with the background needed to understand and use microcontrollers, specifically the popular Motorola 68HC11. The 68HC11 is relatively easy to work with and has most of the features essential for a complete control system. The book starts at an introductory level by explaining the applications and origins of microcontrollers. Next, a programmer's view of the device is developed. Finally, the hardware is described and the reader learns how to connect it to the outside world for control applications. Many changes have been made to this edition: To acknowledge the prominence of C programming, the topic is introduced earlier and the text uses C program examples throughout. A CD-ROM containing source code, a special demo version of the THRSim11 simulator, a IC11 demo C compiler, a cross assembler, fuzzy logic tools, and assorted electronic design tools is included. Because it provides a practical way to explore programming and interfacing concepts, readers will find the simulator extremely useful. Chapter openers now list learning objectives to help the reader pick out the important points in each chapter. Numerous helpful appendices have been added to reinforce key topics. This book is an excellent guide and reference, and it will prove indispensable to students of control automation and interested amateurs, as well as to experienced users of microcontrollers. An Instructor's Manual (ISBN 0-13-033248-8) is available free of charge to instructors using the book for a course.