R8CSLASH15 datasheet(105/277 Pages) RENESAS

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R8C/14 Group, R8C/15 Group

13. Timers

Rev.2.10

Jan 19, 2006

Page 93 of 253

REJ09B0164-0210

Figure 13.7

TXMR Register in Pulse Width Measurement Mode

Timer X Mode Register

Symbol

Address

After Reset

TXMR

008Bh

00h

Bit Symbol

Bit Name

Function

INT1

_____

/CNTR0 Signal

Polarity Sw itch Bit(1)

[INT1]

_______

0 : Rising edge

1 : Falling edge

NOTES :

The IR bit in the INT1IC register may be set to “1” (requests interrupt) w hen the R0EDG bit is rew ritten.

Refer to 20.2.5 Changing Interrupt Factor.

R0EDG

TXOCNT

TXMOD2

Set to “0” in pulse w idth measurement mode

TXMOD0

Operating Mode Select Bit 0, 1

b1 b0

1 1 : Pulse w idth measurement mode

TXMOD1

0000

b7 b6 b5 b4

Set to “0” in pulse w idth measurement mode

b3 b2

[CNTR0]

0 : Measures “L” level w idth

1 : Measures “H” level w idth

TXS

Timer X Count Start Flag(2)

0 : Stops counting

1 : Starts counting

Refer to 20.4.2 Tim er X for precautions on the TXS bit.

Set to “0” in pulse w idth measurement mode

TXUND

TXEDG

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