Freescale Semiconductor, Inc.
Technical Data — MC68HC705C8A
Section 4. Interrupts
4.1 Contents
4.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
4.3
Interrupt Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Software Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Port B Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Capture/Compare Timer Interrupts . . . . . . . . . . . . . . . . . . .55
SCI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
SPI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.4
Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
4.2 Introduction
This section describes how interrupts temporarily change the normal
processing sequence.
MC68HC705C8A — Rev. 3
MOTOROLA
Technical Data
Interrupts
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