Microcontrollers are used in video games, automobiles, toys, robotics, and every electronic device imaginable to perform specific functions and enrich our lives. One of the most widely produced microcontrollers in the world is the 8051, which is produced by more than fifty companies and is one of the most popular to study.

This textbook covers the hardware and software features of the 8051 in a systematic manner. Using Assembly language programming in the first six chapters, it 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 gain mastery of the topic rapidly and move on to the topic of embedded systems project design.

New To This Edition

* A new chapter on 8051 C programming (Chapter 7)

* A new section on the 8051 C programming of timers (Section 9.3)

* A new section on the second serial port of the DS89C4x0 chip (Section 10.4)

* A new section on the 8051 C programming of the second serial port (Section 10.5)

A new section on the 8051 C programming of interrupts (Section 11.6) • Programming of the 1KB SRAM of the DS89C4x0 chip (Section 14.4)

* A new section on the 8051 C programming of external memory (Section 14.5) • A new chapter on the DS12887 RTC (real-time clock) chip (Chapter 16)

* A new chapter on motors, relays, and optoisolators (Chapter 17)

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