MC68HC08AS20 Datasheet, PDF (169/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Advance Information — MC68HC08AS20
Section 14. External Interrupt (IRQ)
14.1 Contents
14.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
14.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
14.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170
14.5 IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
14.6 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 174
14.7 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 174
14.2 Introduction
This section describes the nonmaskable external interrupt (IRQ) input.
14.3 Features
Features include:
• Dedicated External Interrupt Pin (IRQ)
• Hysteresis Buffer
• Programmable Edge-Only or Edge and Level Interrupt Sensitivity
• Automatic Interrupt Acknowledge
MC68HC08AS20 — Rev. 4.1
Freescale Semiconductor
Advance Information
169