R27 datasheet(129/487 Pages) RENESAS

129 / 487 page

R8C/26 Group, R8C/27 Group

12. Interrupts

Rev.2.10

Sep 26, 2008

Page 110 of 453

REJ09B0278-0210

12. Interrupts

12.1

Interrupt Overview

12.1.1

Types of Interrupts

Figure 12.1 shows the Types of Interrupts.

Figure 12.1

Types of Interrupts

• 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.

• Non-Maskable Interrupts:

The interrupt enable flag (I flag) does not enable or disable these interrupts.

The interrupt priority order cannot be changed based on interrupt priority

level.

Interrupts

(non-maskable interrupts)

Hardware

Software

(non-maskable interrupts)

(maskable interrupts)

Special

Peripheral functions(1)

Undefined instruction (UND instruction)

Overflow (INTO instruction)

BRK instruction

INT instruction

Watchdog timer

Oscillation stop detection

Voltage monitor 1

Voltage monitor 2

Single step(2)

Address break(2)

Address match

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.

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