MC68HC08JB1 Datasheet, PDF (179/216 Pages) Motorola, Inc – Microcontrollers

Technical Data — MC68HC08JB1
Section 12. External Interrupt (IRQ)
12.1 Contents
12.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
12.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
12.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
12.5 IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
12.6 PTE4/D– Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
12.7 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 183
12.8 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 184
12.9 IRQ Option Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . 185
12.2 Introduction
The IRQ module provides two external interrupt inputs: one dedicated
IRQ pin and one shared port pin, PTE4/D–.
12.3 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
MC68HC08JB1 — Rev. 2.1
Freescale Semiconductor
Technical Data
179