Understanding 8085 8086 Microprocessor and Peripheral ICs: (Through Question & Answer)

303 Pages·2009·3.99 MB·English

by  S. K Sen

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Copyright © 2010, 2006, New Age International (P) Ltd., Publishers
Published by New Age International (P) Ltd., Publishers
All rights reserved.
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ISBN (13) : 978-81-224-2974-9
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Preface to the Second Edition

It is heartening to note that the text is going to the second edition. Inadvertently, numerous
typographical errors crept into the first edition - which are being taken care of in this edition.
Requests from many faculty as well as students have led the author to include 8086
Microprocessor and its peripheral ICs in an elaborate fashion to the existing book.
The author is open to suggestions for improvements of the book.
S.K. Sen
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Preface to the First Edition

Since the advent of microprocessors in the 70s, a good many books have been written covering
different aspects of microprocessors and microcomputers. A knowledge and exposure to
microprocessors is a must for practising engineers and scientists in the fields of Electrical,
Electronics, Instrumentation and Software Engineering.
This book, written in a problem-solution form, is primarily intended for undergraduate students
of Engineering who have already gone through the course on microprocessors, but is at sea in
finding out the right answers to the numerous questions that confront them. In my view, this book
is an answer to their long list of queries.
Amongst the microprocessors available, 8085 has been taken up for discussion because it is a
time-tested 8 bit microprocessor and still very much in use today. Smaller bit microprocessors
have not much relevance and larger bit microprocessors are merely an extension of this basic
microprocessor. Thus, a thorough understanding of 8085 microprocessor is central and is a
gateway to the more powerful range of microprocessors in use today.
The book begins with a discussion on microprocessor, microcomputer and associated languages
in Chapter 1 followed by a detailed discussion on 8085 microprocessor in Chapter 2 and instruction
types and timing diagrams in Chapter 3. Interrupt details of 8085 are taken up for discussion in
Chapter 4 while programming techniques are discussed in Chapter 5. Chapter 6 discusses stack
and subroutines, while data transfer technique and interfacing are taken up for discussion in
Chapter 7. A detailed discussion on memory is included in Chapter 8. Different peripherals like
8255, 8155/8156, 8355/8755, 8279, 8259, 8257, 8253, 8254 and 8251 are discussed in Chapter 9,
while the last and concluding Chapter discusses bus standards RS-232C and IEEE-488.
This comprehensive book on microprocessor and peripheral ICs will cater to the needs of
engineering students, and for students appearing and aspiring for GATE, IETE, AMIE and other
all India level examinations conducted by various public sector undertakings.
Suggestions for improvements in any form will be highly appreciated by the author.
S.K. Sen
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Contents

Preface to the Second Edition v

Preface to the First Edition vii

1. Microprocessor, Microcomputer and Associated Languages 1-10

2. The 8085 Microprocessor 11-31

3. Instruction Types and Timing Diagrams 32-34

4. 8085 Interrupts 35-45

5. Programming Techniques 46-57

6. Stack and Subroutines 58-66

7. Data Transfer Techniques: Interfacing Memories and I/Os 67-75

8. Memory 76-91

9. Peripheral Chips
(a) 8255 : Programmable Peripheral Interface 92-103

(b) 8155/8156 : Programmable I/O Ports and Timer 104-108

(c) 8355/8755 : Programmable I/O Ports with ROM/EPROM 109-110

(d) 8279 : Programmable Keyboard/Display Interface 111-116

(e) Priority Interrupt Controller 8259 117-132

(f) Programmable DMA Controller (DMAC) 8257 133-143

(g) Programmable Interval Timer 8253 144-148

(h) 8254 : Programmable Interval Timer 149-152

(i) USART 8251 (Universal Synchronous/Asynchronous Receiver Transmitter) 153-167

10. Bus Standards
(a) RS : 232C Standard 168-169

(b) IEEE : 488 Bus 170-181

(c) The Universal Serial Bus (USB) 182-192

11. The 8086 Microprocessor 193-209

12. Memory Organisation 210-218

13. Addressing Modes of 8086 219-225

14. The Instruction Set of 8086 226-239

15. Programming Techniques 240-243

16. Modular Program Development and Assembler Directives 244-250