Book excerpt: This textbook covers the hardware and software features of the 8051 in a systematic manner. Using Assembly language programming in the first six chapters, in Provides readers with an in-depth understanding of the 8051 architecture. From Chapter 7, this book uses both Assembly and C to Show the 8051 interfacing with real-world devices such as LCDs, keyboards, ADCs, sensors, real-time-clocks, and the DC and Stepper motors, The use of a large number of examples helps the reader to gain mastery of the topic rapidly and move on to the topic of embedded systems project design.