HD6473032F16 Datasheet, PDF (385/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 10 16-Bit Integrated Timer Unit (ITU)
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
3
4
Output Pin
TIOCA3
TIOCB3
TIOCA4
TOCXA4
TIOCB4
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)
Table 10.6 Register Settings in Reset-Synchronized PWM Mode
Register
TCNT3
TCNT4
GRA3
GRB3
GRA4
GRB4
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
Rev. 3.00 Mar 21, 2006 page 355 of 814
REJ09B0302-0300