This book comprehensively exemplifies the fundamental principles and applications of embedded microcomputer systems with the most popular Cortex-M4-based microcontroller, especially, concentrating on the hardware model of the TM4C123 system, and the Keil ARM-MDK (microcomputer development kit). After reading this book, you will be able to design various microprocessor- or microcomputer-based application systems. This book has the following main features: -The software and hardware models of the Cortex-M4F processor are introduced concisely.-The interrupt handling, system reset, and watchdog, as well as power control and management of the TM4C123 system are addressed in detail.-Detail I/O concepts and structures, serial/parallel data transfer and control, DMA control, and ADC/DAC circuits, as well the structures and features of TM4C123 GPIO ports, including serial port (UART), SPI, and I2C buses. Besides, various timers/counters are dealt with in depth.-Address the structures, functions, and applications of various timers/counters and programmable timers.-The design principles of keyboard/keypad circuits, including both polling and interrupt methods, as well as circuit modules and applications of LED and LCD displays are involved in detail.-Numerous practical examples are given to help the reader understand the important concepts and real-world applications. -A great number of review questions are provided to each section to help readers evaluate their understandings about the topics introduced in the section.This book is not only suitable for the following courses and others: Fundamental Principles of Microcomputers, or Principles and Applications of Microcomputers, but also provides the fundamental knowledge and practical reference designs for professionals.