Microcontrollers Data Sheet

MC68HC(7)08KH12 — Rev. 1.1 Advance Information
Freescale Semiconductor
213
Advance Information — MC68HC(7)08KH12
Section 14. External Interrupt (IRQ)
14.1 Contents
14.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213
14.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213
14.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214
14.4.1 IRQ1/V
PP
Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215
14.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . .217
14.6 IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . .217
14.2 Introduction
The IRQ module provides a non-maskable interrupt input.
14.3 Features
Features of the IRQ module include the following:
• A Dedicated External Interrupt Pin (IRQ1
/V
PP
)
• IRQ1 Interrupt Control Bits
• Hysteresis Buffer
• Programmable Edge-only or Edge and Level Interrupt Sensitivity
• Automatic Interrupt Acknowledge
•IRQ1/V
PP
pin includes internal pullup resistor