Microprocessor_Interfacing.pdf

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MICROPROCESSOR
INTERFACING
BY JOSEPH J. CARR
FIRST EDITION
FIRST PRINTING
Copyright
©
1982 by TAB BOOKS Inc.
Printed in the United States of America
Reproduction or publication of the content in any manner, without express
permission
of
the publisher. is prohibited. No liability is assumed with respect to
the use of the information herein.
Ubrary of Congress Cataloging in Publication Data
Carr. Joseph J.
Microprocessor interfacing.
InCludes index.
1. Microprocessors. 2. Interface circuits.
I.
litle.
TK7895.M5C37
001.64
81-18282
ISBN 0-8306-0064-7
AACR2
ISBN 0-8306-1396-X (pbk.)
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Contents
Introduction
v
1
Introduction to Digital Electronics
Logic States-Positive and Negative Logic-Logic Families-
Speed Versus Power-RTL Devices-DTL Devices-TTL
Devices-CMOS Devices-HTL Devices- Emitter-Coupled
Logic-Gates-TTL and CMOS Examples-Flip-Flops-
Additional Types of Flip-Flops- Multivibrators-Shift Reg-
isters-Digital Counters
1
2
Interfacing Digital IC Families
3
Control Signals
Z-80 Control Signals-8080A Control Signals-6502 Control
Signals-6800 Control Signals
39
42
4
Address Decoder and Device Select Circuits
Addressing in Microcomputers-Eight-Bit Decoders-Address-
Block Decoding-Generating Port /Device Select Signals
47
5
1/0
Interfacing
59
I/O Ports-Parallel-Outport Port-Design-Parallel-Input Port-
Design-Bidirectional Parallel-I/O Port-Design-Serial I
/0-
Ports-Software Serial-I / O-Ports- TTL /CMOS Hardware
Methods-RS-232 Interfacing-Current-Loop Ports
6
Memory Interfacing
Dynamic Memory-Adding Wait States-Memory-Mapped De-
vices
69
7
UART
71

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