File: power_ctrl.rst

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Power control
=============

:meth:`pyb.wfi` is used to reduce power consumption while waiting for an
event such as an interrupt.  You would use it in the following situation::

    while True:
        do_some_processing()
        pyb.wfi()

Control the frequency using :meth:`pyb.freq`::

    pyb.freq(30000000) # set CPU frequency to 30MHz