MC68HC908JB16_13 Datasheet, PDF (281/332 Pages) Freescale Semiconductor, Inc – Microcontrollers

Technical Data — MC68HC908JB16
Section 15. External Interrupt (IRQ)
15.1 Contents
15.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
15.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
15.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .282
15.5 IRQ Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
15.6 PTE4/D– Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
15.7 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 285
15.8 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 286
15.9 IRQ Option Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . 287
15.2 Introduction
The IRQ module provides two external interrupt inputs: one dedicated
IRQ pin and one shared port pin, PTE4/D–.
15.3 Features
Features of the IRQ module include:
• Two external interrupt pins, IRQ and PTE4/D–
• 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
MC68HC908JB16 — Rev. 1.1
Freescale Semiconductor
External Interrupt (IRQ)
Technical Data
281