M16CSLASH29 datasheet(94/499 Pages) RENESAS

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9. Interrupts

page 70

• 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 9.1 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

_______

NMI

________

DBC (2)

Watchdog timer

Oscillation stop and re-oscillation

detection

Low voltage detection

Single step (2)

Address match

NOTES:

1. Peripheral function interrupts are generated by the MCU's internal functions.

2. Do not normally use this interrupt because it is provided exclusively for use by development

tools.

9. Interrupts

Note

The SI/O4 interrupt of peripheral function interrupts is not available in the 64-pin package.

The low voltage detection function is not available in M16C/29 T-ver. and V-ver..

9.1 Type of Interrupts

Figure 9.1

shows types of interrupts.

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