M16C26A Datasheet, PDF (78/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
9. Interrupt
9. Interrupt
Note
The 42-pin package does not use UART0 transmission interrupt and UART0 reception interrupt of
peripheral function.
M16C/26T does not use voltage down detection interrupt.
9.1 Type of Interrupts
Figure 9.1.1 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 9.1.1. 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 Feb.15, 2007 ^{page 61} of 329
REJ09B0202-0200