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making pwm in normal io

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electronic4india

electronic4india

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hello friends i am try to making sine
wave inverter by pic16f72. well ,
i need four output pwm for h bridge
driver .
my question is how to make pwm
four normal i/o .
 

i need 6500hz pwm .minimum 32 step need in pwm .
 


How many bits resolution do you want for the PWM signal? If you need 32 steps in the sinus curve, I suppose you need at least 5bits resolution in the PWM period. With a resulting frequency out of 6500Hz, it will give a base frequency for the PWM input to be 6656000Hz. Relative high for the PIC with a soft PWM generator.
 

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