I think that that depends on the timers on the board:
[www.arduino.cc]
(I guess that Marlin uses the built-in Pwm function of Arduino)
Another guess would be that a Signal based on a 20ms Cycle, wich would be normally used to control brushless motors is used.
I also found this:
[www.google.ch]
See Point 2.1.4
[www.arduino.cc]
(I guess that Marlin uses the built-in Pwm function of Arduino)
Another guess would be that a Signal based on a 20ms Cycle, wich would be normally used to control brushless motors is used.
I also found this:
[www.google.ch]
See Point 2.1.4