R5F21114FP datasheet(73/227 Pages) RENESAS

73 / 227 page

R8C/11 Group

Rev.1.20

Jan 27, 2006

page 62 of 204

REJ09B0062-0120

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10.2.3 INT1 Interrupt and INT2 Interrupt

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INT1 interrupts are triggered by INT1 inputs. The edge polarity is selected with the R0EDG bit in the

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TXMR register. The INT1 pin is shared with the CNTR0 pin.

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INT2 interrupts are triggered by INT2 inputs. The edge polarity is selected with the R1EDG bit in the

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TYZMR register. The INT2 pin is shared with the CNTR1 pin.

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Figure 10.13 shows the TXMR and TYZMR registers when using INT1 and INT2 interrupts.

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Figure 10.13 TXMR Register and TYZMR Register when INT1 and INT2 Interrupt Used

Timer X mode register

SymbolAddressAfter reset

TXMR008B16

0016

Bit name

Function

Bit symbol

b7 b6 b5 b4 b3 b2 b1 b0

0 0 : Timer mode or pulse period

measurement mode(3)

b1 b0

TXMOD2

TXS

TXMOD1

R0EDG

TXMOD0

TXOCNT

Operation mode

select bit 0, 1

Timer X count

start flag

0 : Stops counting

1 : Starts counting

Operation mode

select bit 2

Must set to "0" in timer mode

0 : Rising edge

1 : Falling edge

TXEDG

TXUND

INT1/CNTR0 polarity

switching bit(1, 2)

Must set to "0" in timer mode

0 : Other than pulse period measurement

mode(3)

NOTES:

1. The IR bit in the INT1IC may be set to “1” (interrupt requested) when the R0EDG bit is rewritten. Refer to the

paragraph 19.2.5 “Changing Interrupt Factor” in the Usage Notes Reference Book.

2. This bit is used to select the polarity of INT1 interrupt in timer mode.

3. When using INT1 interrupts, should select timer mode.

Timer Y, Z mode register

SymbolAddressAfter reset

TYZMR008016

0016

Bit name

Function

Bit symbol

b7 b6 b5 b4 b3 b2 b1 b0

TZMOD1

TYS

TYWC

TYMOD0

TZMOD0

Timer Y operation

mode bit

Timer Y write

control bit

0 : Timer mode(1)

TZWC

TZS

0 : Stops counting

1 : Starts counting

Timer Z-related bit

Timer Y count

start flag

R1EDG

0 : Rising edge

1 : Falling edge

INT2/CNTR1 polarity

switching bit(2)

NOTES:

1. When using INT2 interrupts, must set to timer mode.

2. The IR bit in the INT2IC may be set to “1” (interrupt requested) when the R1EDG bit is rewritten.

Refer to the paragraph 19.2.5 “Changing Interrupt Factor” in the Usage Notes Reference Book.

Function varies

depending on the operation mode

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10.2 INT Interrupt

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