MC68HC08JL3_05 Datasheet, PDF (149/198 Pages) Freescale Semiconductor, Inc – Microcontrollers

Technical Data — MC68H(R)C08JL3
Section 13. External Interrupt (IRQ)
13.1 Contents
13.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
13.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
13.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150
13.4.1 IRQ1 Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
13.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 153
13.6 IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . . 153
13.2 Introduction
The IRQ (external interrupt) module provides a maskable interrupt input.
13.3 Features
Features of the IRQ module include the following:
• A dedicated external interrupt pin, IRQ1
• IRQ1 interrupt control bits
• Hysteresis buffer
• Programmable edge-only or edge and level interrupt sensitivity
• Automatic interrupt acknowledge
• Selectable internal pullup resistor
MC68H(R)C08JL3 — Rev. 4.1
Freescale Semiconductor
Technical Data
149