R8C2K datasheet(256/471 Pages) RENESAS

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R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 239 of 450

REJ09B0406-0110

Figure 16.81

Operating Example of Input Capture Function

Set to 0 by a program

Transfer

i = 0 or 1

The above applies under the following conditions:

Bits CCLR2 to CCLR0 in the TRDCRi register are set to 001b. (the TRDi register set to 0000h by TRDGRAi register input capture).

Bits TCK2 to TCK0 in the TRDCRi register are set to 101b (TRDCLK input for the count source).

Bits CKEG1 to CKEG0 in the TRDCRi register are set to 01b (count at the falling edge for the count source).

Bits IOA2 to IOA0 in the TRDIORAi register are set to 101b (input capture at the falling edge of the TRDIOAi input).

The BFCi bit in the TRDMR register is set to 1 (the TRDGRCi register is used as the buffer register of the TRDGRAi register).

Count value

in TRDi register

FFFFh

0009h

0006h

TSTARTi bit in

TRDSTR register

65536

TRDGRAi register

0000h

TRDIOAi input

TRDGRCi register

IMFA bit in

TRDSRi register

OVF bit in

TRDSRi register

0009h

0006h

TRDCLK input

count source

Transfer

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