MC68HC705MC4MP datasheet(39/180 Pages) FREESCALE

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General Release Specification

Interrupts

General Release Specification — MC68HC705MC4

Section 4. Interrupts

4.1 Contents

4.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

4.3

Reset Interrupt Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.4

Software Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.5

Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.5.1

External Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.5.2

Timer Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

4.5.2.1

Input Capture Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . .46

4.5.2.2

Output Compare Interrupt . . . . . . . . . . . . . . . . . . . . . . . .46

4.5.2.3

Timer Overflow Interrupt . . . . . . . . . . . . . . . . . . . . . . . . .46

4.5.3

Serial Communications Interface Interrupt . . . . . . . . . . . . .47

4.5.4

Core Timer Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

4.2 Introduction

The MCU can be interrupted eight different ways:

1. Nonmaskable software interrupt instruction (SWI)

2. External asynchronous interrupt (IRQ)

3. Input capture interrupt (TIMER)

4. Output compare interrupt (TIMER)

5. Timer overflow interrupt (TIMER)

6. Serial communications interrupt (SCI)

7. Core timer overflow interrupt (CTIMER)

8. Real-time interrupt (CTIMER)

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