Figure 10.21 Example Of Pwm Mode Operation (1); Figure 10.22 Example Of Pwm Mode Operation (2) - Hitachi H8S/2628 Hardware Manual

TCNT value
TGRA
TGRB
H'0000
TIOCA
Figure 10.22 shows an example of PWM mode 2 operation.
In this example, synchronous operation is designated for channels 0 and 1, TGRB_1 compare
match is set as the TCNT clearing source, and 0 is set for the initial output value and 1 for the
output value of the other TGR registers (TGRA_0 to TGRD_0, TGRA_1), outputting a 5-phase
PWM waveform.
In this case, the value set in TGRB_1 is used as the cycle, and the values set in the other TGRs are
used as the duty cycle levels.
TCNT value
TGRB_1
TGRA_1
TGRD_0
TGRC_0
TGRB_0
TGRA_0
H'0000
TIOCA0
TIOCB0
TIOCC0
TIOCD0
TIOCA1
Figure 10.23 shows examples of PWM waveform output with 0% duty cycle and 100% duty cycle
in PWM mode.
Rev. 1.0, 09/02, page 212 of 568

Figure 10.21 Example of PWM Mode Operation (1)

Figure 10.22 Example of PWM Mode Operation (2)

Counter cleared by
TGRA compare match
Counter cleared by
TGRB_1 compare match
Time
Time