MC68HSC705C8ACFS datasheet(49/222 Pages) FREESCALE

49 / 222 page

MC68HC705C8A — Rev. 3

Technical Data

MOTOROLA

Interrupts

Technical Data — MC68HC705C8A

Section 4. Interrupts

4.1 Contents

4.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.3

Interrupt Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.3.1

Software Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.3.2

External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.3.3

Port B Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

4.3.4

Capture/Compare Timer Interrupts . . . . . . . . . . . . . . . . . . .55

4.3.5

SCI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

4.3.6

SPI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

4.4

Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

4.2 Introduction

This section describes how interrupts temporarily change the normal

processing sequence.

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