MC68HC08AZ32 Datasheet, PDF (157/424 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
External Interrupt Module (IRQ)
IRQ
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
IRQ pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
IRQ module during break interrupts . . . . . . . . . . . . . . . . . . . . . . . . . 160
IRQ status and control register (ISCR) . . . . . . . . . . . . . . . . . . . . . . . 160
Introduction
The IRQ module provides the nonmaskable interrupt input.
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
1-irq
MOTOROLA
External Interrupt Module (IRQ)
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MC68HC08AZ32
155