M16C29 Datasheet, PDF (94/499 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/Tiny SERIES

M16C/29 Group
9. Interrupts
9. Interrupts
Note
The SI/O4 interrupt of peripheral function interrupts is not available in the 64-pin package.
The low voltage detection function is not available in M16C/29 T-ver. and V-ver..
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 MCU'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. 1.12 Mar.30, 2007
REJ09B0101-0112
page 70 _{of 458}