H8SLASH3003 datasheet(356/715 Pages) RENESAS

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10.4.5 Reset-Synchronized PWM Mode

In reset-synchronized PWM mode channels 3 and 4 are combined to produce three pairs of

complementary PWM waveforms, all having one waveform transition point in common.

When reset-synchronized PWM mode is selected TIOCA3, TIOCB3, TIOCA4, TOCXA4,

TIOCB4, and TOCXB4 automatically become PWM output pins, and TCNT3 functions as an up-

counter.

Table 10-5 lists the PWM output pins. Table 10-6 summarizes the register settings.

Table 10-5 Output Pins in Reset-Synchronized PWM Mode

Channel

Output Pin

Description

TIOCA3

PWM output 1

TIOCB3

PWM output 1´ (complementary waveform to PWM output 1)

TIOCA4

PWM output 2

TOCXA4

PWM output 2´ (complementary waveform to PWM output 2)

TIOCB4

PWM output 3

TOCXB4

PWM output 3´ (complementary waveform to PWM output 3)

Table 10-6 Register Settings in Reset-Synchronized PWM Mode

Setting

TCNT3

Initially set to H'0000

TCNT4

Not used (operates independently)

GRA3

Specifies the count period of TCNT3

GRB3

Specifies a transition point of PWM waveforms output from TIOCA3 and TIOCB3

GRA4

Specifies a transition point of PWM waveforms output from TIOCA4 and TOCXA4

GRB4

Specifies a transition point of PWM waveforms output from TIOCB4 and TOCXB4

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H8/3003 Datasheet(PDF) 356 Page - Renesas Technology Corp