R01UH0823EJ0100 Rev.1.00 Page 563 of 1823
Jul 31, 2019
RX23W Group 23. Multi-Function Timer Pulse Unit 2 (MTU2a)
(k) 0% and 100% Duty Cycle Output in Complementary PWM Mode
In complementary PWM mode, 0% and 100% duty cycle PWM waveforms can be output as required. Figure 23.49 to
Figure 23.53 show output examples.
A 100% duty cycle waveform is output when the data register value is set to 0000h. The waveform in this case has a
positive phase with a 100% on-state. A 0% duty cycle waveform is output when the data register value is set to the same
value as the MTU3.TGRA register. The waveform in this case has a positive phase with a 100% off-state.
On and off compare matches occur simultaneously, but if a turn-on compare match and turn-off compare match for the
same phase occur simultaneously, both compare matches are ignored and the waveform does not change.
Figure 23.49 Example of 0% and 100% Waveform Output in Complementary PWM Mode (1)
Figure 23.50 Example of 0% and 100% Waveform Output in Complementary PWM Mode (2)
a
b
cd
a'
b'
MTU3.TGRA
TCDRA
TDDRA
0000h
Positive-phase
output
Negative-phase
output
Output waveform is active-low.
Buffer operation is set for transfer at the crest and trough.
MTU4.TGRA
TEMP2
ON
OFF
ON
OFF
Don't care
0% duty cycle output
100% duty cycle output
T1 interval
T2 interval
T1 interval
Counter for generating
a turn-off timing
Counter for generating
a turn-on timing
a
d
a b
b
MTU3.TGRA
TCDRA
TDDRA
0000h
Positive-phase
output
Negative-phase
output
Output waveform is active-low.
Buffer operation is set for transfer at the crest and trough.
MTU4.TGRA
TEMP2
ON
OFF
OFF
OFF
Don't care
100% duty cycle output
0% duty cycle output
c
T1 interval T2 interval T1 interval
Counter for generating
a turn-off timing
Counter for generating
a turn-on timing
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