Mitsubishi microcomputers
M16C / 61 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt
Overview of Interrupt
Type of Interrupts
Figure 1.13.1 lists the types of interrupts.
Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
Software
INT instruction
Interrupt
Reset
_______
NMI
________
DBC
Special
Watchdog timer
Single step
Hardware
Address matched
Peripheral I/O (Note)
Note: Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer system.
Figure 1.13.1. Classification of interrupts
• 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.
• Non-maskable interrupt : An interrupt which cannot be enabled (disabled) by the interrupt enable flag
(I flag) or whose interrupt priority cannot be changed by priority level.
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MITSUBISHI [ Mitsubishi Group ]
