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The Prototyping Area
The prototyping area contains an area of plated through holes so that
external circuitry can be placed on the board. This circuitry can be
interfaced with the QS module through the breakout header to the right.
At the bottom of this area is a row connected to ground and at the top is a
row connected to the USB power supply. The circuitry on the development
board will draw approximately 40 to 50mA of current, so any circuitry
added to the prototyping area cannot draw more than 50mA before
enumeration, per the USB specification (please see the Power Supply
Guidelines in the module’s data guide for more information). If the circuitry
will require more current, then an external power supply will be required.
Resistor R10 is a 0-ohm jumper that can be removed to isolate the
power supply row from the USB supply so that an external supply can be
attached to this row.
All of the module’s control and data lines are connected to the header,
allowing easy access from the prototyping area. A jumper is also included
to route the data from the RS-232 Section or the Microcontroller section to
the QS module. It must be appropriately set before the sections will work
properly.
Figure 10: Prototyping Area
– 6 –
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