The special feature of this edition is that it uses ARM instead of MIPS as the core processor to describe the basic principles of computer design, which adds another layer of connotation to this book. As the mainstream processor in the embedded field, ARM is of great significance in the embedded computing field. This book fills the gap in the existing mathematical system, that is, teaching the basic principles of computer composition to students studying embedded systems. Like the previous editions, this book still focuses on introducing computer hardware/software interfaces and skillfully connecting them with the basic knowledge of embedded system design.