Microprocessor Interfacing - 1st Edition - ISBN: 9780434923366, 9781483142128

Microprocessor Interfacing

1st Edition

Authors: R E Vears
eBook ISBN: 9781483142128
Imprint: Newnes
Published Date: 26th March 1990
Page Count: 200
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Microprocessor Interfacing provides the coverage of the Business and Technician Education Council level NIII unit in Microprocessor Interfacing (syllabus U86/335).
Composed of seven chapters, the book explains the foundation in microprocessor interfacing techniques in hardware and software that can be used for problem identification and solving. The book focuses on the 6502, Z80, and 6800/02 microprocessor families. The technique starts with signal conditioning, filtering, and cleaning before the signal can be processed. The signal conversion, from analog to digital or vice versa, is explained to answer why conversion is necessary for the microcomputer or processor. The types of analogue to digital converter, voltage measurements, scaling, and interfacing with ADC to a microcomputer are all taken into account. After the signal has been converted into readable data, the date transfer techniques are described. For data between systems and subsystems to be efficient, the timing, electrical, I/O lines, serial data, and bus structure should be considered. A more detailed explanation of parallel I/O controllers as applied to Z80 PIO and the 6821 PIA follows. For serial I/O controllers, the serial data transfers, speed in baud rate, software routines, and ASCII codes are all examined. Finally, the dedicated I/O controllers involving keyboard encoding, the ASCII (QWERTY) keyboard interface, the visual display unit, cathode ray tube controller devices, and the drive controllers are discussed, as each of these requires one specific application.
This book is useful for computer engineers, software engineers, computer technicians, teachers, and instructors in the field of computing learning. This text can also be an informative reading for those have great interest in computer hardware.

Table of Contents

Preface 1 Signal Conditioning Need for Signal Conditioning Amplification Operational Amplifiers Filtering Problems 2 D to A Conversion Signal Conversion Types of Digital to Analogue Converter DAC Characteristics Interfacing DACs to a Microcomputer DAC Applications Problems 3 A to D Conversion Types of Analogue to Digital Converter ADC Characteristics Interfacing ADCs to a Microcomputer Voltage Measurements Scaling Problems 4 Data Transfer Techniques Synchronization of Data Transfers Direct Memory Access Electrical Buffering Serial/Parallel and Parallel/Serial Conversion Multiplexing Standard Buses Electrical Isolation Problems 5 Parallel I/O Controllers Need for I/O Controllers Simple Parallel I/O Ports Hardware/Software for General Purpose Interfaces Programmable Parallel I/O Controllers Problems 6 Serial I/O Controllers Serial Data Transfers Baud Rate Software UART Shift Register (In VIA) Dedicated Serial I/O Controllers Software Routines EIA RS-232 Standards TTL/RS-232C Interfaces Problems 7 Dedicated I/O Controllers Keyboard Encoding Hex Keyboard Interface ASCII (QWERTY) Keyboard Interface VDU Interface Forming Characters on the CRT Screen Cathode Ray Tube Controller Devices Floppy Disk Controllers Index


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R E Vears

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