Ad va nc e Inform a tion — MC68HC(9)08PT48
Se c tion 20. Exte rna l Inte rrup t Mod ule (IRQ)
20.1 Conte nts
20.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315
20.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315
20.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316
20.4.1
20.4.2
IRQ1 Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .319
IRQ2 Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320
20.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . .321
20.6 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . .321
20.2 Introd uc tion
20.3 Fe a ture s
This section describes the external interrupt module which supports
external interrupt functions.
Features of the IRQ module include:
• Two dedicated external interrupt pins (IRQ1 and IRQ2)
• Separate IRQ1 and IRQ2 interrupt masks
• Hysteresis buffers
MC68HC(9)08PT48 — Rev. 2.0
MOTOROLA
Advance Information
315
External Interrupt Module (IRQ)
FREESCALE [ Freescale ]
