PFS154 datasheet(56/91 Pages) PADAUK

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PFS154

8bit MTP Type IO Controller

Page 56 of 91

PDK-DS-PFS154_CN_V105 –Jun. 9, 2020

PWMG1DTL

0x00;

PWMG1DTH

_duty - dead_zone_F;

// Use duty cycle to adjust the dead-time after the falling edge of PWM1

PWMG1CUBL

0x00;

PWMG1CUBH

100;

The above values are assigned before enable PWM output

//******************** PWM out control *********************

$ PWMG0C Enable,Inverse,PA0,SYSCLK;

PWMG0 output the PWM0 waveform to PA0

$ PWMG0S INTR_AT_DUTY,/1,/1;

.delay dead_zone_R;

Use delay to adjust the dead-time before the rising edge of PWM1

$ PWMG1C Enable, PA4, SYSCLK;

PWMG1 output the PWM1 waveform to PA4

$ PWMG1S INTR_AT_DUTY, /1, /1;

//***** Note: for the output control part of the program, the code sequence can not be moved ******//

While(1)

{ nop;

}

The PWM0 / PWM1 waveform obtained by the above program is shown in Fig. 19.

Fig. 19: Two complementary PWM waveforms with dead zones

Users can modify the dead_zone_R and dead_zone_F values in the program to adjust the dead-time. Table

8 provides data corresponding to different dead-time for users' reference. Where, if dead-time = 4us, then

there are dead zones of 4us before and after PWM1 high level.

PWM0

PWM1

Dead-Time

PFS154 Datasheet(PDF) 56 Page - PADAUK Technology.