User Manual

Page 7
1. Power supply
You can supply power to the board with a Mini-B USB cable
provided in the package. On-board voltage regulators provide
the appropriate voltage levels to each component on the board.
Power LED (GREEN) will indicate the presence of power supply.
You can also power the board using a Li-Polymer battery, via
on-board battery connector. On-board battery charger circuit
enables you to charge the battery over USB connection. LED
diode (RED) will indicate when battery is charging. Charging
current is ~300mA and charging voltage is 4.2V DC.
Battery power supply
USB
power supply
Figure 1-1: Connecting
USB power supply
Figure 1-2: Connecting
Li-Polymer battery
click
™
boards that use a 3.3V power supply can draw up to 750 mA of current, which is more current than a USB can supply
(500 mA); In those cases you would need to use the battery as the power supply, or the vsys pin on the side of the board.
NOTE