M16C28 Datasheet, PDF (87/423 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/28 Group (M16C/28, M16C/28B)
9. Interrupts
9. Interrupts
Note
The SI/O4 interrupt of peripheral function interrupt is not available in the 64-pin package.
9.1 Type of Interrupts
Figure 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)
_______
NMI
________
DBC ⁽²⁾
Watchdog timer
Oscillation stop and re-oscillation
detection
Low voltage detection
Single step ⁽²⁾
Address match
Peripheral function ⁽¹⁾
(Maskable interrupt)
NOTES:
1. Peripheral function interrupts are generated by the microcomputer's internal functions.
2. Do not normally use this interrupt because it is provided exclusively for use by development tools.
Figure 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. 2.00 Jan. 31, 2007 ^{page 67} of 385
REJ09B0047-0200