R8CSLASH20 datasheet(193/501 Pages) RENESAS

193 / 501 page

R8C/20 Group, R8C/21 Group

14. Timers

Rev.2.00 Aug 27, 2008

Page 177 of 458

REJ09B0250-0200

Figure 14.39

Registers TRDIORA0 to TRDIORA1 in Input Capture Function

Timer RD I/O Control Register Ai (i = 0 or 1)

Symbol

Address

After Reset

TRDIORA0

TRDIORA1

0141h

0151h

10001000b

Bit Symbol

Bit Name

Function

NOTES:

Nothing is assigned. If necessary, set to 0.

When read, the content is 1.

—

IOB0

TRDGRB mode selection bit(2)

b3 b2

IOA3

b1 b0

IOA2

b7 b6 b5 b4

IOA1

IOA0

TRDGRA control bit

b1 b0

0 0 : Input capture to the TRDGRAi register

at the rising edge

0 1 : Input capture to the TRDGRAi register

at the falling edge

1 0 : Input capture to the TRDGRAi register

at both edges

1 1 : Do not set

Set to 1 (input capture) in the input capture

function

When selecting 1 (The TRDGRDi register is used as a buffer register of TRDGRBi register) for this bit by the BFDi bit

in the TRDMR register, set the IOD2 bit in the TRDIORCi register to the same value as the IOB2 bit in the TRDIORAi

—

(b7)

IOB2

TRDGRB control bit

b5 b4

0 0 : Input capture to the TRDGRBi register

at the rising edge

0 1 : Input capture to the TRDGRBi register

at the falling edge

1 0 : Input capture to the TRDGRBi register

at both edges

1 1 : Do not set

The IOA3 bit in the only TRDIORA0 register is enabled. Set to the IOA3 bit in the TRDIORA1 to 1.

The IOA3 bit is enabled w hen the IOA2 bit is set to 1 (input capture function).

TRDGRA mode selection bit(1) Set to 1 (input capture) in the input capture

function

Input capture input sw itch

bit(3,4)

0 : fOCO128 Signal

1 : TRDIOA0 pin

When selecting 1 (The TRDGRCi register is used as a buffer register of the TRDGRAi register) for this bit by the BFCi

bit in the TRDMR register, set the IOC2 bit in the TRDIORCi register to the same value as the IOA2 bit in the TRDIORAi

IOB1

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