Using PWM Output Pins
To set the PWM period on any pin which can be used for PWM use the following:
analogWrite(3, 127); //PinId, PWM period from 0 to 255There is no need to set the pin as an output as it will be automatically set as one. The PWM frequency is fixed at approximately 490 Hz.
Boards With > 8 Bit PWM Resolution
Most boards are 8bit. Some can use higher resolutions on some of the pins by using special commands. A few Arduinos support analogWriteResolution() function to set the resolution in use.
https://www.arduino.cc/reference/en/language/functions/zero-due-mkr-family/analogwriteresolution/
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