R8C datasheet(43/199 Pages) RENESAS

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Spiegazioni elettronici	RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

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R8C/10 Group

Rev.1.20 Jan 27, 2006

page 33 of 180

REJ09B0019-0120

• 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.

Figure 10.1 Interrupts

Interrupt

Software

(Non-maskable interrupt)

Hardware

Special

(Non-maskable interrupt)

Peripheral function(1)

(Maskable interrupt)

Undefined instruction (UND instruction)

Overflow (INTO instruction)

BRK instruction

INT instruction

Watchdog timer

Oscillation stop detection

Single step(2)

Address match

NOTES:

1. Peripheral function interrupts are generated by the peripheral functions built in the microcomputer system.

2. Avoid using this interrupt because this is a dedicated interrupt for development support tools only.

10. Interrupt

10.1 Interrupt Overview

10.1.1 Type of Interrupts

Figure 10.1 shows types of interrupts.

10.1 Interrupt Overview

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