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Gurwinder Kaur, Lovely Professional University Unit 14: Interrupts

Unit 14: Interrupts Notes

CONTENTS
Objectives
Introduction

14.1 8085 Interrupts
14.2 Type 8085 Interrupts
14.2.1 Makeable Interrupts

14.2.2 Non-Maskable Interrupt
14.3 Interrupt 8085 Microprocessor
14.4 Differences between Intel 8080 and 8085 Processors
14.4.1 Arithmetic
14.4.2 Logical

14.4.3 Compliment
14.4.4 Rotate
14.4.5 Clear

14.4.6 Branching
14.4.7 Jump on Condition (of a Bit)
14.4.8 Call
14.5 Summary

14.6 Keywords
14.7 Self-Assessment Questions
14.8 Review Questions

14.9 Further Reading

Objectives

After studying this unit, you will able to understand the following:
• Overview of 8085 interrupts

• Type 8085 interrupts
• Overview of interrupt 8085 microprocessor
• Differences between Intel 8080 and 8085 processors

Introduction

A signal that gets the attention of the CPU and is usually generated when I/O is required. For
example, hardware interrupts are generated when a key is pressed or when the mouse is moved.

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