221
Figures 12.21 and 12.22 show examples of the output of PWM waveforms with duty cycles of 0%
and 100%.
•
TOB, TOC, and TOD = 0: initial output values are set to 0
TCNT value
GRA
H'0000
FTIOB
Time
GRB
Duty 0%
Write to GRB
Write to GRB
TCNT value
GRA
H'0000
FTIOB
Time
GRB
Duty 100%
Write to GRB
Write to GRB
When compare match for the period register
occurs at the same time as that for the duty
register, the output signal will not change.
TCNT value
GRA
H'0000
FTIOB
Time
GRB
Duty 100%
Write to GRB
Write to GRB
Write to GRB
When compare match for the period register
occurs at the same time as that for the duty
register, the output signal will not change.
Duty 0%
Write to GRB
Figure 12.21 PWM Mode (Example 3)
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