Please help me understand this PWM frequency equation

[moqane]

Hi I have been trying for days to understand the PWM frequency equation here



at this post:

**broken link removed**

I'm trying to play a wav file using PIC 18f452
- PIC crystal osc frequency = 20MHZ
- the WAV file frequency 11.025 khz , 8bit, Mono

How to solve this equation? please provide an example.

Thanks in advance.

 

[D.A.(Tony)Stewart]

maybe this will fill in the gaps

https://www.micro-examples.com/public/microex-navig/doc/097-pwm-calculator.html