MC68HC08AZ0 Datasheet, PDF (173/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
External Interrupt Module (IRQ)
IRQ
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
IRQ pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
IRQ module during break interrupts . . . . . . . . . . . . . . . . . . . . . . . . . 176
IRQ status and control register (ISCR) . . . . . . . . . . . . . . . . . . . . . . . 176
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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MC68HC08AZ0
171