M16C80 Datasheet, PDF (67/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
9. Interrupt Outline
9. Interrupt Outline
9.1 Types of Interrupts
Figure 9.1 lists the types of interrupts.
Software
Interrupt
Hardware
Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
BRK2 instruction
INT instruction
Special
Reset
_______
NMI
Watchdog timer
Single step
Address matched
Peripheral I/O^*1
*1 Peripheral I/O interrupts are generated by the peripheral functions built into the microcomputer
system. High-speed interrupt can be used as highest priority in peripheral I/O interrupts.
Figure 9.1 Classification of interrupts
• 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 enable flag
(I flag) or whose interrupt priority cannot be changed by priority level.
Rev.1.00 Aug. 02, 2005 ^{Page 56} of 329
REJ09B0187-0100