R28 datasheet(213/473 Pages) RENESAS

213 / 473 page

R8C/28 Group, R8C/29 Group

14. Timers

Rev.2.10

Sep 26, 2008

Page 194 of 441

REJ09B0279-0210

Figure 14.44

TRCIOR1 Register for Input Capture Function

j = A, B, C, or D

BFC, BFD: Bits in TRCMR register

Table 14.17

Functions of TRCGRj Register when Using Input Capture Function

Setting

Input Capture

Input Pin

TRCGRA

−

General register. Can be used to read the TRC register value

at input capture.

TRCIOA

TRCGRB

TRCIOB

TRCGRC

BFC = 0

General register. Can be used to read the TRC register value

at input capture.

TRCIOC

TRCGRD

BFD = 0

TRCIOD

TRCGRC

BFC = 1

Buffer registers. Can be used to hold transferred value from

the general register. (Refer to 14.3.3.2 Buffer Operation.)

TRCIOA

TRCGRD

BFD = 1

TRCIOB

Timer RC I/O Control Register 1

Symbol

Address

After Reset

TRCIOR1

0125h

10001000b

Bit Symbol

Bit Name

Function

NOTES:

TRCGRC mode select bit(1)

Set to 1 (input capture) in the input capture

function.

—

IOC1

IOC0

TRCGRC control bits

b1 b0

0 0 : Input capture to the TRCGRC register

at the rising edge

0 1 : Input capture to the TRCGRC register

at the falling edge

1 0 : Input capture to the TRCGRC register

at both edges

1 1 : Do not set.

b7 b6 b5 b4

b3 b2

—

(b3)

b1 b0

IOC2

—

(b7)

IOD2

TRCGRD control bits

b5 b4

0 0 : Input capture to the TRCGRD register

at the rising edge

0 1 : Input capture to the TRCGRD register

at the falling edge

1 0 : Input capture to the TRCGRD register

at both edges

1 1 : Do not set.

When the BFD bit in the TRCMR register is set to 1 (buffer register of TRCGRB register), set the IOD2 bit in the

TRCIOR1 register to the same value as the IOB2 bit in the TRCIOR0 register.

Nothing is assigned. If necessary, set to 0.

When read, the content is 1.

—

IOD0

IOD1

Nothing is assigned. If necessary, set to 0.

When read, the content is 1.

When the BFC bit in the TRCMR register is set to 1 (buffer register of TRCGRA register), set the IOC2 bit in the

TRCIOR1 register to the same value as the IOA2 bit in the TRCIOR0 register.

TRCGRD mode select bit(2)

Set to 1 (input capture) in the input capture

function.

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