R8C2K datasheet(255/471 Pages) RENESAS

255 / 471 page

R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 238 of 450

REJ09B0406-0110

Figure 16.80

Registers TRDGRAi, TRDGRBi, TRDGRCi, and TRDGRDi in Input Capture Function

The following registers are disabled in the input capture function: TRDOER1, TRDOER2, TRDOCR,

TRDPOCR0, and TRDPOCR1.

i = 0 or 1, j = either A, B, C, or D

BFCi, BFDi: Bits in TRDMR register

Set the pulse width of the input capture signal applied to the TRDIOji pin to 3 cycles or more of the timer RD

operation clock (refer to Table 16.25 Timer RD Operation Clocks) for no digital filter (the DFj bit in the

TRDDFi register set to 0).

Table 16.38

TRDGRji Register Functions in Input Capture Function

Setting

Input-Capture Input Pin

TRDGRAi

−

General register

The value in the TRDi register can be read at input

capture.

TRDIOAi

TRDGRBi

TRDIOBi

TRDGRCi

BFCi = 0

General register

The value in the TRDi register can be read at input

capture.

TRDIOCi

TRDGRDi

BFDi = 0

TRDIODi

TRDGRCi

BFCi = 1

Buffer register

The value in the TRDi register can be read at input

capture. (Refer to 16.4.2 Buffer Operation)

TRDIOAi

TRDGRDi

BFDi = 1

TRDIOBi

Timer RD General Registers Ai, Bi, Ci, and Di (i = 0 or 1)

(1)

Symbol

Address

After Reset

TRDGRA0

TRDGRB0

TRDGRC0

TRDGRD0

TRDGRA1

TRDGRB1

TRDGRC1

TRDGRD1

0149h-0148h

014Bh-014Ah

014Dh-014Ch

014Fh-014Eh

0159h-0158h

015Bh-015Ah

015Dh-015Ch

015Fh-015Eh

FFFFh

NOTE:

(b8)

(b15)

Function

Refer to Table 16.38 TRDGRji Register Functions in Input Capture Function

Access registers TRDGRAi to TRDGRDi in 16-bit units. Do not access them in 8-bit units.

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