MC68HC908LJ24 Datasheet, PDF (401/464 Pages) Motorola, Inc – Microcontrollers

Data Sheet — MC68HC908LJ24
Section 19. External Interrupt (IRQ)
19.1 Contents
19.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
19.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
19.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402
19.4.1 IRQ Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404
19.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 405
19.6 IRQ Status and Control Register (INTSCR) . . . . . . . . . . . . . . 405
19.2 Introduction
The external interrupt (IRQ) module provides a maskable interrupt input.
19.3 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 pullup resistor
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
External Interrupt (IRQ)
Data Sheet
401