M16C6S_09 Datasheet, PDF (47/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
Interrupts
Interrupts
Type of Interrupts
Figure 1.9.1 shows types of interrupts.
Software
(Non-maskable interrupt)
Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
INT instruction
Interrupt
Hardware
Special
(Non-maskable interrupt)
________
DBC (Note 2)
Watchdog timer
Single step (Note 2)
Address match
Peripheral function (Note 1)
(Maskable interrupt)
Note 1: Peripheral function interrupts are generated by the microcomputer's internal functions.
Note 2: Do not normally use this interrupt because it is provided exclusively for use by development
support tools.
Figure 1.9.1. 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.5.01 Dec 10, 2009 page 47 of 201
REJ03B0014-0501