This new edition has been completely revised and updated to provide comprehensive information on the ARM Cortex-M4 processor. It offers a complete, up-to-date guide for both the Cortex-M3 and Cortex-M4 processors, facilitating the migration from various processor architectures into the exciting world of Cortex-M3 and M4. This book presents the fundamentals of the ARM architecture and outlines the features of the processors, such as the instruction set and interrupt handling, and demonstrates how to program and utilize the available advanced features, like the Memory Protection Unit (MPU). Chapters on getting started with the tools IAR, Keil, gcc, and CooCox CoIDE assist beginners in developing program code. The content also covers important areas of software development, such as utilizing power-saving features, processing input/output data, mixed-language projects with assembly and C, as well as other advanced topics.