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Section 18 Multi-Function Timer Pulse Unit (MTU)
Rev. 4.00 Sep. 14, 2005 Page 591 of 982
REJ09B0023-0400
18.4.8
Complementary PWM Mode
In the complementary PWM mode, three-phase output of non-overlapping positive and negative
PWM waveforms can be obtained by combining channels 3 and 4.
PWM waveforms can be obtained by combining channels 3 and 4.
In complementary PWM mode, TIOC3B, TIOC3D, TIOC4A, TIOC4B, TIOC4C, and TIOC4D
pins function as PWM output pins, the TIOC3A pin can be set for toggle output synchronized with
the PWM period. TCNT_3 and TCNT_4 function as increment/decrement counters.
pins function as PWM output pins, the TIOC3A pin can be set for toggle output synchronized with
the PWM period. TCNT_3 and TCNT_4 function as increment/decrement counters.
Table 18.39 shows the PWM output pins used. Table 18.40 shows the settings of the registers
used.
used.
A function to directly cut off the PWM output by using an external signal is supported as a port
function.
function.
Table 18.39 Output Pins for Complementary PWM Mode
Channel Output
Pin
Description
3
TIOC3B
PWM output pin 1
TIOC3D
PWM output pin 1' (non-overlapping negative-phase
waveform of PWM output 1)
waveform of PWM output 1)
4
TIOC4A
PWM output pin 2
TIOC4B
PWM output pin 3
TIOC4C
PWM output pin 2' (non-overlapping negative-phase
waveform of PWM output 2)
waveform of PWM output 2)
TIOC4D
PWM output pin 3' (non-overlapping negative-phase
waveform of PWM output 3)
waveform of PWM output 3)