R8C2C datasheet(159/615 Pages) RENESAS

159 / 615 page

R8C/2C Group, R8C/2D Group

12. Interrupts

Rev.2.00

Dec 05, 2007

Page 138 of 585

REJ09B0339-0200

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

UART2 receive

UART0 transmit

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

NOTE:

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

INT2

UART1 transmit

Timer RE

Timer RD0

Timer RD1

INT0

INT1

INT3

Timer RB

Timer RA

Priority level of interrupt

Level 0 (default value)

Voltage monitor 2

A/D conversion

Compare 0

Timer RF

Timer RC

Compare 1

UART2 transmit

Capture

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