M16C6K9 Datasheet, PDF (40/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Interrupt
Interrupt
Type of Interrupts
Fig.DD-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
Single step
Address matched
Note: Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer system.
Fig.DD-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.
Rev.1.00 Jun 06, 2003 page 40 of 290