MC68HC05P18A Datasheet, PDF (39/130 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC05P18A
Section 4. Interrupts
4.1 Contents
4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
4.3 CPU Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
4.4 Interrupt Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
4.4.1 Reset Interrupt Sequence . . . . . . . . . . . . . . . . . . . . . . . . . .42
4.4.2 Software Interrupt (SWI). . . . . . . . . . . . . . . . . . . . . . . . . . . .42
4.4.3 Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
4.4.3.1 External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . .43
4.4.3.2 Input Capture Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . .43
4.4.3.3 Output Compare Interrupt . . . . . . . . . . . . . . . . . . . . . . . .44
4.4.3.4 Timer Overflow Interrupt . . . . . . . . . . . . . . . . . . . . . . . . .44
4.2 Introduction
The MCU can be interrupted six different ways:
1. Non-maskable 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. Port A interrupt, if selected as a mask option
MC68HC05P18A
Interrupts
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Technical Data