SH7020 Datasheet, PDF (284/509 Pages) Renesas Technology Corp – SuperH™ RISC engine

TCNT3, TCNT4 value
GRA3
GRB3
TIOCA3
TIOCB3
Duty 0%
(a) With 0% duty
Time
TCNT3, TCNT4 value
GRA3
GRB3
TIOCA3
TIOCB3
Duty 100%
(b) With 100% duty
Time
Figure 10.35 Complementary PWM Mode Operation Example 2
At the point where the up-count/down-count changes in the complementary PWM mode, TCNT3
and TCNT4 will overshoot and undershoot, respectively. When this occurs, the setting conditions
for the IMFA bit of channel 3 and the overflow flag (OVF) of channel 4 are different from usual.
Transfer conditions for the buffer also differ. The timing is as shown in figures 10.36 and 10.37.
268 RENESAS