HD64F3437TF16 Datasheet, PDF (246/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

10.3 Operation
10.3.1 Timer Increment
The PWM clock source is created by dividing the system clock (ø). The timer counter increments
on a TCNT clock pulse generated from the falling edge of the prescaler output as shown in figure
10.2.
ø
Prescaler
output
TCNT clock
pulse
TCNT
N–1
N
Figure 10.2 TCNT Increment Timing
N+1
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