274
TCNT3, TCNT4 value
GRA3
GRB3
TIOCA3
TIOCB3
Time
0% duty
(a) With 0% duty
TIOCA3
TIOCB3
GRA3
GRB3
TCNT3, TCNT4 value
Time
100% duty
(b) With 100% duty
Figure 10.35 Complementary PWM Mode Operation Example 2
At the point where the up-count/down-count changes in 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.
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