M16C Datasheet, PDF (52/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Preliminary Specifications REV.B
Mitsubishi microcomputers
Specifications in this manual are tentative and subject to change.
M16C / 6N Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupts
Overview of Interrupt
Type of Interrupts
Figure 6-1 lists the types of interrupts.
Software
Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
INT instruction
Interrupt
Hardware
Special
Peripheral I/O (Note)
Reset
_______
NMI
________
DBC
Watchdog timer/Oscillation Stop
Single step
Address matched
Note: Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer system.
Figure 6-1. 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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