Created advanced topic

docs/reference/pins/set-pull.md

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+# Set Pull
+
+Configure the electrical pull of the specified pin.
+
+Many micro:bit pins can be configured as _pull-ups_.  For example, a
+pull-up can set a pin's voltage to high (3.3 volts, or `1` when
+calling [digital read pin](/reference/pins/digital-read-pin)).  If one
+end of a button is connected to ``P0`` (set to high) and the other end
+is connected to ``GND`` (0 volts), then when you press the button,
+``P0`` is driven to 0 volts, and the micro:bit software can detect a
+button press.
+
+```sig
+pins.setPull(DigitalPin.P9, PinPullMode.PullDown);
+```
+
+### Parameters
+
+* ``pin``: The micro:bit hardware pin to configure (``P0``-``P20``)
+* ``to``: The pull to which to set the pin (**down**, **up**, or **none**)
+
+### Example
+
+The following example sets the pull of pin ``P0`` to **up** (high).
+
+```blocks
+pins.setPull(DigitalPin.P0, PinPullMode.PullUp);
+```
+
+### See also
+
+[BBC micro:bit | mbed](https://developer.mbed.org/platforms/Microbit/)