R8C2K datasheet(308/471 Pages) RENESAS

308 / 471 page

R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 291 of 450

REJ09B0406-0110

BFC0, BFD0, BFC1, BFD1: Bits in TRDMR register

Since values cannot be written to the TRDGRB0, TRDGRA1, or TRDGRB1 register directly after count

operation starts (prohibited item), use the TRDGRD0, TRDGRC1, or TRDGRD1 register as a buffer register.

However, to write data to the TRDGRD0, TRDGRC1, or TRDGRD1 register, set bits BFD0, BFC1, and BFD1

to 0 (general register). After this, bits BFD0, BFC1, and BFD1 may be set to 1 (buffer register).

Table 16.46

TRDGRji Register Functions in Complementary PWM Mode

Setting

PWM Output Pin

TRDGRA0

−

General register. Set the PWM period at initialization.

Setting range: Setting value or above in TRD0 register

FFFFh - TRD0 register setting value or below

Do not write to this register when the TSTART0 and TSTART1

bits in the TRDSTR register are set to 1 (count starts).

(Output inverted every half

period of TRDIOC0 pin)

TRDGRB0

−

General register. Set the changing point of PWM1 output at

initialization.

Setting range: Setting value or above in TRD0 register

TRDGRA0 register - TRD0 register setting

value or below

Do not write to this register when the TSTART0 and TSTART1

bits in the TRDSTR register are set to 1 (count starts).

TRDIOB0

TRDIOD0

TRDGRA1

−

General register. Set the changing point of PWM2 output at

initialization.

Setting range: Setting value or above in TRD0 register

TRDGRA0 register - TRD0 register setting

value or below

Do not write to this register when the TSTART0 and TSTART1

bits in the TRDSTR register are set to 1 (count starts).

TRDIOA1

TRDIOC1

TRDGRB1

−

General register. Set the changing point of PWM3 output at

initialization.

Setting range: Setting value or above in TRD0 register

TRDGRA0 register - TRD0 register setting

value or below

Do not write to this register when the TSTART0 and TSTART1

bits in the TRDSTR register are set to 1 (count starts).

TRDIOB1

TRDIOD1

TRDGRC0

−

This register is not used in complementary PWM mode.

−

TRDGRD0

BFD0 = 1

Buffer register. Set the changing point of next PWM1 output.

(Refer to 16.4.2 Buffer Operation.)

Setting range: Setting value or above in TRD0 register

TRDGRA0 register - TRD0 register setting

value or below

Set this register to the same value as the TRDGRB0 register

for initialization.

TRDIOB0

TRDIOD0

TRDGRC1

BFC1 = 1

Buffer register. Set the changing point of next PWM2 output.

(Refer to 16.4.2 Buffer Operation.)

Setting range: Setting value or above in TRD0 register

TRDGRA0 register - TRD0 register setting

value or below

Set this register to the same value as the TRDGRA1 register

for initialization.

TRDIOA1

TRDIOC1

TRDGRD1

BFD1 = 1

Buffer register. Set the changing point of next PWM3 output.

(Refer to 16.4.2 Buffer Operation.)

Setting range: Setting value or above in TRD0 register

TRDGRA0 register - TRD0 register setting

value or below

Set this register to the same value as the TRDGRB1 register

for initialization.

TRDIOB1

TRDIOD1

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