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13
Using the Prototype Board
Snap a Carrier Board onto the socket on the Prototype Board as shown in
Figure 12.
Place the power switch into the “USB” position then connect a micro USB
cable into the connector at the top of the board. Plug the other end into a
PC or any USB charger. The board is powered by the USB bus. This board
features a prototyping area to facilitate the addition of application-specific
circuitry. The prototyping area contains a large area of plated through-holes
so that external circuitry can be placed on the board. The holes are set at
0.100” on center with a 0.040” diameter, accommodating most industry-
standard SIP and DIP packages.
At the top of the prototyping area is a row connected to the 3.3V power
supply and at the bottom is a row connected to ground. External circuitry
can be interfaced to the transceiver through the breakout headers. The
numbers next to the headers correspond to the pin numbers on the Carrier
Board. Figure 4 shows the pin assignments for the Carrier Board.
The OVERLOAD LED indicates that that too much current is being pulled
from the USB bus. This is used to prevent damage to the parts or the bus.
The overload condition is reset once the excess current draw is removed.
Figure 12: Prototype Board with a Carrier Board
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