MC68HC908LD64 Datasheet, PDF (315/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Data Sheet — MC68HC908LD64
Section 20. External Interrupt (IRQ)
20.1 Contents
20.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
20.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
20.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316
20.4.1 IRQ Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
20.5 IRQ Status and Control Register (INTSCR) . . . . . . . . . . . . . . 319
20.6 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 320
20.2 Introduction
The IRQ (external interrupt) module provides a maskable interrupt input.
20.3 Features
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 pull-up resistor
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
External Interrupt (IRQ)
Data Sheet
315