HD6417034 Datasheet, PDF (320/691 Pages) Renesas Technology Corp – SuperH RISC ENGINE SH7032 AND SH7034

An example of buffer operation in complementary PWM mode between GRB3 and BRB3 is
shown in figure 10.52. By making GRB3 larger than GRA3 using buffer operation, a PWM
waveform with a duty cycle of 0% is generated. The transfer from BRB to GRB occurs upon
TCNT3 and GRA compare match and TCNT4 underflow.
TCNT3 and TCNT4 values
TCNT3
H' 1FFF
GRA3
GRB3
H' 0999
TCNT4
H' 0000
BRB3
H' 0999
H' 1FFF
H' 0999
Time
GRB3 H' 0999
H' 0999
H' 1FFF
H' 1FFF
H' 0999
TIOCA3
TIOCB3
Figure 10.52 Buffer Mode Operation Example 3 (Complementary PWM Mode)
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