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docs/esp32: Add info about PWM duty cycle range to esp32 quickref. 

See related #4581.
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spacemanspiff2007 2020-06-25 15:35:58 +02:00 committed by Damien George
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@ -175,6 +175,7 @@ range from 1Hz to 40MHz but there is a tradeoff; as the base frequency
*increases* the duty resolution *decreases*. See *increases* the duty resolution *decreases*. See
`LED Control <https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/ledc.html>`_ `LED Control <https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/ledc.html>`_
for more details. for more details.
Currently the duty cycle has to be in the range of 0-1023.
Use the ``machine.PWM`` class:: Use the ``machine.PWM`` class::