R28 datasheet(168/473 Pages) RENESAS

168 / 473 page

R8C/28 Group, R8C/29 Group

14. Timers

Rev.2.10

Sep 26, 2008

Page 149 of 441

REJ09B0279-0210

Figure 14.10

TRAIOC Register in Pulse Period Measurement Mode

Timer RA I/O Control Register

Symbol

Address

After Reset

TRAIOC

0101h

00h

Bit Symbol

Bit Name

Function

INT1

_____

/TRAIO select bit

0 : INT1

_____

/TRAIO pin (P1_7)

1 : INT1

_____

/TRAIO pin (P1_5)

NOTE:

—

(b7-b6)

Nothing is assigned. If necessary, set to 0.

When read, the content is 0.

TRAO output enable bit

TRAIO input filter select

bits(1)

b5 b4

0 0 : No filter

0 1 : Filter w ith f1 sampling

1 0 : Filter w ith f8 sampling

1 1 : Filter w ith f32 sampling

Set to 0 in pulse period measurement mode.

TEDGSEL

TRAIO polarity sw itch bit

—

TOPCR

TOENA

TIPF0

TRAIO output control bit

TIPF1

b7 b6 b5 b4

When the same value from the TRAIO pin is sampled three times continuously, the input is determined.

b3 b2

TIOSEL

b1 b0

0 : Measures measurement pulse from one

rising edge to next rising edge

1 : Measures measurement pulse from one

falling edge to next falling edge

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