HD643303x Hitachi, HD643303x Datasheet - Page 241

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

8.4.5 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 8-5 lists the PWM output pins. Table 8-6 summarizes the register settings.
Table 8-5 Output Pins in Reset-Synchronized PWM Mode
Channel
3
4
Table 8-6 Register Settings in Reset-Synchronized PWM Mode
Register
TCNT3
TCNT4
GRA3
GRB3
GRA4
GRB4
Output Pin
TIOCA3
TIOCB3
TIOCA4
TOCXA4
TIOCB4
TOCXB4
Setting
Initially set to H'0000
Not used (operates independently)
Specifies the count period of TCNT3
Specifies a transition point of PWM waveforms output from TIOCA3 and TIOCB3
Specifies a transition point of PWM waveforms output from TIOCA4 and TOCXA4
Specifies a transition point of PWM waveforms output from TIOCB4 and TOCXB4
Description
PWM output 1
PWM output 1´ (complementary waveform to PWM output 1)
PWM output 2
PWM output 2´ (complementary waveform to PWM output 2)
PWM output 3
PWM output 3´ (complementary waveform to PWM output 3)
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