MC68HC908JB8 Datasheet, PDF (219/286 Pages) Motorola, Inc – MICROCONTROLLERS

Technical Data — MC68HC908JB8•MC68HC08JB8•MC68HC08JT8
Section 13. External Interrupt (IRQ)
13.1 Contents
13.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
13.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
13.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220
13.5 IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
13.6 PTE4/D– Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
13.7 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 223
13.8 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 224
13.9 IRQ Option Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . 225
13.2 Introduction
The IRQ module provides two external interrupt inputs: one dedicated
IRQ pin and one shared port pin, PTE4/D–.
13.3 Features
Features of the IRQ module include:
• Two external interrupt pins, IRQ (5V) and PTE4/D– (5V)
• IRQ interrupt control bits
• Hysteresis buffer
• Programmable edge-only or edge and level interrupt sensitivity
• Automatic interrupt acknowledge
• Low leakage IRQ pin for external RC wake up input
• Selectable internal pullup resistor
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
External Interrupt (IRQ)
Technical Data
219