MC68HC908JK1 Datasheet, PDF (159/210 Pages) Motorola, Inc – MC68HC908JK1

Technical Data — MC68H(R)C908JL3
Section 13. External Interrupt (IRQ)
13.1 Contents
13.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
13.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
13.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
13.4.1 IRQ1 Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
13.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 163
13.6 IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . . 163
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)C908JL3 — Rev. 1.0
MOTOROLA
External Interrupt (IRQ)
Technical Data
159