Datasheet

MC68HC908GR8 — Rev 4.0 Technical Data
MOTOROLA External Interrupt (IRQ) 167
Technical Data — MC68HC908GR8
Section 12. External Interrupt (IRQ)
12.1 Contents
12.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167
12.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167
12.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168
12.5 IRQ1 Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170
12.6 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . .171
12.7 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . .172
12.2 Introduction
The IRQ (external interrupt) module provides a maskable interrupt input.
12.3 Features
Features of the IRQ module include:
• A dedicated external interrupt pin (IRQ1)
• IRQ interrupt control bits
• Hysteresis buffer
• Programmable edge-only or edge and level interrupt sensitivity
• Automatic interrupt acknowledge
• Internal pullup resistor
Frees
cale Semiconductor,
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