M16C User Manual.pdf

InterruptMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTER4.1 Overview of Interrupt4.1.1 Type of InterruptsFigure 4.1.1 lists the types of interrupts.Interrupt⎫⎪⎪⎪⎬⎪⎪⎪⎭SoftwareHardwareFigure 4.1.1. Classification of interrupts⎫⎪⎬⎪⎭SpecialPeripheral I/O (Note)⎫⎪⎬⎪⎭⎫⎪⎪⎬⎪⎪⎭Undefined instruction (UND instruction)Overflow (INTO instruction)BRK instructionINT instructionReset_______NMI________DBCWatchdog timerSingle stepAddress matchedNote: Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer system.• Maskable interrupt :• Non-maskable interrupt :An interrupt which can be enabled (disabled) by the interrupt enable flag(I flag) or whose interrupt priority can be changed by priority level.An interrupt which cannot be enabled (disabled) by the interrupt enableflag (I flag) or whose interrupt priority cannot be changed by priority level.486