WBUS-DIP28 reference
====================

.. image:: https://store.micropython.org/media/products/WBUS_DIP28_ds1.jpg
    :alt: WBUS-DIP28
    :width: 700px

For the schematics see:
`WBUS_DIP28_schematics.pdf <https://micropython.org/resources/WBUS_DIP28_schematics.pdf>`_

.. warning:: Do not charge an attached battery via the USB HS port on the PYBD.

    Battery charging with the WBUS-DIP28 must only be done using the USB FS port
    which is the port on the WBUS-DIP28 itself.

.. note::
   Please take note of the following power supply options:

    * The simplest way is to plug a USB cable into the USB FS port on the WBUS-DIP28.
      That will power the WBUS-DIP28 and the attached PYBD.
    * You can attach a single-cell Li-Ion battery to a connector underneath the
      WBUS-DIP28 (see +/- labels in the rectangle under the USB FS connector).
      This battery will power an attached PYBD.
    * If a USB cable is plugged in to the USB FS port and a battery is attached
      at the same time then USB will charge the battery.
    * You can power the PYBD with a USB cable plugged in to the USB HS port of the
      PYBD, but you *must not* have a battery connected to the WBUS-DIP28.
    * The VIN pin is *output only* on the WBUS-DIP28 and will be supplied by either
      the USB FS or battery.
    * The 3V3 pin is *output only* and should not be used to power the board.  It
      can be used as a regulated 3.3V output supply.

Tile header
-----------

There is a single tile header on the bottom of the WBUS-DIP28.  It is connected
to the Y pins of the PYBD, and the corresponding I2C and SPI buses are::

    i2c = machine.I2C('Y')
    spi = machine.SPI('Y')