270
Reset-Synchronized PWM Mode Operation: Figure 10.32 shows an example of operation in
reset-synchronized PWM mode. TCNT3 operates as an up-counter that is cleared to H'0000 at
compare match with GRA3. TCNT4 runs independently and is isolated from GRA4 and GRB4.
The PWM waveform outputs toggle at each compare match (GRB3, GRA3, and GRB4 with
TCNT3) and when the counter is cleared.
See section 10.4.8, Buffer Mode, for details on simultaneously setting reset-synchronized PWM
mode and buffer operation.
GRA3
GRB3
GRB4
GRA4
TIOCA3
TIOCB3
TIOCA4
TOCXA4
TIOCB4
TOCXB4
Counter cleared at GRA3 compare match
Time
TCNT value
Figure 10.32 Reset-Synchronized PWM Mode Operation Example 1
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