R8CSLASH20 datasheet(175/501 Pages) RENESAS

175 / 501 page

R8C/20 Group, R8C/21 Group

14. Timers

Rev.2.00 Aug 27, 2008

Page 159 of 458

REJ09B0250-0200

14.3

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 14.11 lists the Timer RD Operation Clocks.

Figure 14.27 shows the Block Diagram of Timer RD. Timer RD has 5 modes:

• Timer mode

- Input capture function

Transfer the counter value to a register as a trigger of the external signal

- Output compare function

Detect the register value match with a counter

(Pin output can be changed at detection)

The following 4 modes using the output compare function.

• PWM mode

Output any-wide pulse 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 waveform (2) with same 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 every 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 14.12 to 14.20 lists the Pin Functions of timer RD.

Table 14.11

Timer RD Operation Clocks

Condition

Operation Clock of Timer RD

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

(The TCK2 to TCK0 bits in the TRDCR0 and TRDCR1 registers are set to 000b to

101b.)

The count source is fOCO40M.

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

fOCO40M

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