R27 datasheet(142/487 Pages) RENESAS

Part #	R27

Description	RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES

PDF	487 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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R8C/26 Group, R8C/27 Group

12. Interrupts

Rev.2.10

Sep 26, 2008

Page 123 of 453

REJ09B0278-0210

12.1.6.10 Interrupt Priority Judgement Circuit

The interrupt priority judgement circuit selects the highest priority interrupt, as shown in Figure 12.11.

Figure 12.11

Interrupt Priority Level Judgement Circuit

UART1 receive

UART0 receive

A/D conversion

SSU / I2C bus(1)

Key input

IPL

Lowest

Highest

Priority of peripheral function interrupts

(if priority levels are same)

Interrupt request level

judgment output signal

Interrupt request

acknowledged

I flag

Address match

Watchdog timer

Oscillation stop detection

Voltage monitor 1(2)

NOTES:

1. The IICSEL bit in the PMR register switches functions.

2. For N, D version only.

UART0 transmit

UART1 transmit

Timer RE

INT0

INT1

INT3

Timer RB

Timer RA

Priority level of interrupt

Level 0 (default value)

Voltage monitor 2

Timer RC

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