Let say, MCU (T89...) is clocked by 20Mhz. So maximal PCA clock is 10Mhz (1/2 input mode). Now, maximal PWM reload freq is 10Mhz/256 ~= 39Khz. If we reload PWM every second cycle then it is ~18Khz, every 3rd - 13Khz, every 4th - 9.8Khz etc.
Now the question: what should I do if I need nor 13Khz neither 18kHz but, let say, 15kHz instead? Okay, I may change OSC, but the question is widen: is it possible to tune PWM output freq flexibly? Maybe with any software tricks even?
Thank you!