MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 171

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

13.1 Contents
13.2 Introduction
13.3 Features
MOTOROLA
Data Sheet — MC68HC908QY4
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
13.2
13.3
13.4
13.5
13.6
13.7
The IRQ pin (external interrupt), shared with PTA2 (general purpose
input) and keyboard interrupt (KBI), provides a maskable interrupt input.
Features of the IRQ module include the following:
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External interrupt pin, IRQ
IRQ interrupt control bits
Hysteresis buffer
Programmable edge-only or edge and level interrupt sensitivity
Automatic interrupt acknowledge
Selectable internal pullup resistor
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 175
IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 175
Section 13. External Interrupt (IRQ)
External Interrupt (IRQ)
171