12. Interrupts; Interrupt Overview; Types Of Interrupts - Renesas R8C/18 Series Hardware Manual

R8C/18 Group, R8C/19 Group

12. Interrupts

12.1

Interrupt Overview

12.1.1

Types of Interrupts

Figure 12.1 shows the types of Interrupts.
Software
(non-maskable interrupts)
Interrupt
Hardware
NOTES:
1. Peripheral function interrupts in the MCU are used to generate peripheral interrupts.
2. Do not use this interrupt. This is for use with development tools only.
Figure 12.1 Interrupts
•
Maskable interrupts:
•
Non-maskable interrupts: The interrupt enable flag (I flag) does not enable or disable interrupts.
Rev.1.30 Apr 14, 2006
REJ09B0222-0130
Special
(non-maskable interrupts)
Peripheral Function
(maskable interrupts)
The interrupt enable flag (I flag) enables or disables these interrupts.
The interrupt priority order can be changed based on the interrupt
priority level.
The interrupt priority order cannot be changed based on interrupt
priority level.
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Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
INT instruction
Watchdog timer
Oscillation stop detection
Voltage monitor 2
(2)
Single step
Address match
(1)
12. Interrupts