MC68HC08AB16A Datasheet, PDF (331/380 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AB16A
Section 18. External Interrupt (IRQ)
18.1 Contents
18.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
18.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
18.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
18.4.1 IRQ Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
18.5 IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . . 335
18.6 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 336
18.2 Introduction
The external interrupt (IRQ) module provides a maskable interrupt input.
18.3 Features
Features of the IRQ module include the following:
• A dedicated external interrupt pin, IRQ
• Hysteresis buffer
• Programmable edge-only or edge and level interrupt sensitivity
• Automatic interrupt acknowledge
• Internal pullup resistor
MC68HC08AB16A — Rev. 2.0
MOTOROLA
External Interrupt (IRQ)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
331