MC68HC08AZ32A Datasheet, PDF (179/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AZ32A
Section 14. External Interrupt Module (IRQ)
14.1 Contents
14.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
14.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
14.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
14.4.1 IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
14.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . 184
14.6 IRQ Status and Control Register (ISCR). . . . . . . . . . . . . . .184
14.2 Introduction
The IRQ module provides the nonmaskable interrupt input.
14.3 Features
Features of the IRQ module include the following:
• Dedicated external interrupt pins (IRQ)
• IRQ interrupt control bit
• Hysteresis buffer
• Programmable edge-only or edge and level interrupt sensitivity
• Automatic interrupt acknowledge
MC68HC08AZ32A — Rev 1.0
MOTOROLA
External Interrupt Module (IRQ)
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Technical Data
179