R8CSLASH20 datasheet(116/501 Pages) RENESAS

Part #	R8C/20

Description	MCU R8C FAMILY / R8C/2x SERIES

PDF	501 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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116 / 501 page

R8C/20 Group, R8C/21 Group

12. Interrupts

Rev.2.00 Aug 27, 2008

Page 100 of 458

REJ09B0250-0200

12.1.6.10 Interrupt Priority Judgement Circuit

The interrupt priority judgement circuit selects the highest priority interrupt.

Figure 12.11 shows the Interrupt Priority Level Judgement Circuit.

Figure 12.11

Interrupt Priority Level Judgement Circuit

INT3

Timer RB

Timer RA

INT0

INT1

UART1 receive

UART0 receive

A/D conversion

SSU/I2C bus(1)

Key Input

IPL

Priority level of each interrupt

Level 0 (default value)

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 2

NOTE:

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

UART0 transmit

INT2

UART1 transmit

Timer RE

Timer RD0

Timer RD1

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