MC68HC908BD48 Datasheet, PDF (251/290 Pages) Freescale Semiconductor, Inc – Microcontrollers

Technical Data — MC68HC908BD48
Section 18. External Interrupt (IRQ)
18.1 Contents
18.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
18.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
18.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
18.5 IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
18.6 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 255
18.7 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 255
18.2 Introduction
The IRQ (external interrupt) module provides a maskable interrupt input.
18.3 Features
Features of the IRQ module include:
• 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
MC68HC908BD48 — Rev. 1.0
MOTOROLA
External Interrupt (IRQ)
Technical Data
251