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When input capture occurs the TCNT value is transferred to the general register, and the
previous general register value is transferred to the buffer register.
• Complementary PWM mode
The buffer register value is transferred to the general register when TCNT3 and TCNT4
change counting direction.
• Reset-synchronized PWM mode
The buffer register value is transferred to the general register at GRA3 compare match.
8.4.2 Basic Functions
Counter Operation: When one of bits STR0 to STR4 is set to 1 in the timer start register (TSTR),
the timer counter (TCNT) in the corresponding channel starts counting. The counting can be free-
running or periodic.
• Sample setup procedure for counter
Figure 8-14 shows a sample procedure for setting up a counter.
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