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CMS80F731x Reference Manual
17.4.3
Complementary Model
6 PWM can be set up as 3 sets of complementary PWM pairs. In the complementary mode, the cycle, duty cycle and
clock divider control of PG1, PG3, and PG5 are determined by the PG0, PG2, and PG4 related registers, respectively, that is,
in addition to the corresponding output enable control bits (PWMnOE), the PG1, PG3, and PG5 output waveforms are no
longer controlled by their own registers.
In complementary mode, each set of complementary PWM pairs supports inserting a dead-band delay, and the inserted
dead-zone time is as follows:
PWM0/1 Dead-zone: (1)*T
PWM0
;
PWM2/3 Dead-zone: (1)*T
PWM2
;
PWM4/5 Dead-zone: (1)*T
PWM4
;
T
PWM0
/T
PWM2
/T
PWM4
are the clock source cycles of PG0/PG2/PG4, respectively.
Taking PG0/PG1 as an example, the waveform diagram without dead band in complementary mode is shown in the following
figure:
PERIOD0
CMP0
PG0
PG1
complementary PWM without dead zone
Taking PG0/PG1 as an example, the waveform graph with dead zone in complementary mode is shown in the following
figure:
PWMP0
PWMD0
PG0
PG1
dead zone Inserted complementary PWM
