R8C2K datasheet(233/471 Pages) RENESAS

233 / 471 page

R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 216 of 450

REJ09B0406-0110

16.4

Timer RD

Timer RD has 2 16-bit timers (channels 0 and 1). Each channel has 4 I/O pins.

The operation clock of timer RD is f1 or fOCO40M. Table 16.25 lists the Timer RD Operation Clocks.

Figure 16.63 shows a Block Diagram of Timer RD. Timer RD has 5 modes:

• Timer mode

- Input capture function

Transfer the counter value to a register with an external signal as the

trigger

- Output compare function

Detect register value matches with a counter

(Pin output can be changed at detection)

The following 4 modes use the output compare function.

• PWM mode

Output pulse of any width continuously

• Reset synchronous PWM mode

Output three-phase waveforms (6) without sawtooth wave modulation

and dead time

• Complementary PWM mode

Output three-phase waveforms (6) with triangular wave modulation and

dead time

• PWM3 mode

Output PWM waveforms (2) with a fixed period

In the input capture function, output compare function, and PWM mode, channels 0 and 1 have the equivalent

functions, and functions or modes can be selected individually for each pin. Also, a combination of these functions

and modes can be used in 1 channel.

In reset synchronous PWM mode, complementary PWM mode, and PWM3 mode, a waveform is output with a

combination of counters and registers in channels 0 and 1.

Tables 16.26 to 16.34 list the Pin Functions of timer RD.

Table 16.25

Timer RD Operation Clocks

Condition

Operation Clock of Timer RD

The count source is f1, f2, f4, f8, f32, or TRDCLK input

(bits TCK2 to TCK0 in registers TRDCR0 and TRDCR1 are set to a value from 000b

to 101b).

The count source is fOCO40M

(bits TCK2 to TCK0 in registers TRDCR0 and TRDCR1 are set to 110b).

fOCO40M

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