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3.2
Power Selection and Switches
The BT4 Customer Eval board can be powered by either an external 5v supply or from 1 of 3 on-board batteries.
Figure 3.2 - BT4 Customer Eval Board
– Switch Descriptions
3.2.1
5 Volt External Supply:
An external 5 volt line supply can be provided either via the provided USB cable or via a 5v Bench supply attached
to TP1 and TP2 on the bottom left corner of the board. To select this
power mode, slide the “Power Mode
Switch”, located along the center right edge of the board, to the “Line” position (towards the top of the board).
If “Line” mode is selected, the position of the 3 Battery selection slide switches on the lower right side of the board
do not matter. We recommend all 3 of these switches be slid to the right (towards the edge of the board) in the
“OFF” positions so that the batteries are not drained due to powering their respective on-board voltage regulators.