
R8C/14 Group, R8C/15 Group 11. Interrupt
Rev.2.10 Jan 19, 2006 Page 56 of 253
REJ09B0164-0210
11. Interrupt
11.1 Interrupt Overview
11.1.1 Types of Interrupts
Figure 11.1 shows types of Interrupts.
Figure 11.1 Interrupts
• Maskable Interrupt: The interrupt enable flag (I flag) enables or disables an interrupt. The
interrupt priority order based on the interrupt priority level can be
changed.
• Non-Maskable Interrupt: The interrupt enable flag (I flag) does not enable or disable an
interrupt. The interrupt priority order based on interrupt priority level
cannot be changed.
Interrupt
(Non-Maskable Interrupt)
Hardware
Software
(Non-Maskable Interrupt)
(Maskable Interrupt)
Special
Peripheral Function
(1)
Undefined Instruction (UND Instruction)
Overflow (INTO Instruction)
BRK Instruction
INT Instruction
Watchdog Timer
Oscillation Stop Detection
Voltage Monitor 2
Single Step
(2)
Address Match
NOTES :
1. Peripheral function interrupts in the microcomputer are used to generate the peripheral interrupt.
2. Do not use this interrupt.
For development tools only.
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