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Technical Data — MC68HC908AB32
18.1 Contents
18.2 Introduction
18.3 Features
MC68HC908AB32
Rev. 1.0
—
MOTOROLA
Section 18. External Interrupt (IRQ)
18.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
18.3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
18.4
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
18.4.1
IRQ Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
18.5
IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . . 343
18.6
IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 344
The IRQ (external interrupt) module provides a maskable interrupt input.
Features of the IRQ module include the following:
•
A dedicated external interrupt pin, IRQ
•
IRQ interrupt control bits
•
Hysteresis buffer
•
Programmable edge-only or edge and level interrupt sensitivity
•
Automatic interrupt acknowledge
•
Internal pullup resistor
External Interrupt (IRQ)
Technical Data
339
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