Reset-Synchronized Pwm Mode - Renesas F-ZTAT H8 Series Hardware Manual

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 TIOCA
and TOCXB automatically become PWM output pins, and TCNT3 functions as an up-counter.
4
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
3 TIOCA
TIOCB
4 TIOCA
TOCXA
TIOCB
TOCXB
Table 10.6 Register Settings in Reset-Synchronized PWM Mode
Register 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 TIOCA
GRA4 Specifies a transition point of PWM waveforms output from TIOCA
GRB4 Specifies a transition point of PWM waveforms output from TIOCB
Rev. 7.00 Sep 21, 2005 page 368 of 878
REJ09B0259-0700
Description
PWM output 1
3
PWM output 1´ (complementary waveform to PWM output 1)
3
PWM output 2
4
PWM output 2´ (complementary waveform to PWM output 2)
4
PWM output 3
4
PWM output 3´ (complementary waveform to PWM output 3)
4
, TIOCB , TIOCA , TOCXA
3 3 4
, TIOCB ,
4 4
and TIOCB
3 3
and TOCXA
4 4
and TOCXB
4 4