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ARM-EPM-1017464.0
Confidential
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3.3
Jumpers
The following section provides a description of various jumpers and their function:
Figure 3.3 - BT4 Customer Eval Board
– Jumper Descriptions
3.3.1
Power Control FW Jumper
J47 located along the lower left edge of the board determines how the on-board power regulators are controlled.
The on-board LDO regulators for both the 1.0 and 3.3 volt power rails can be either fixed to these levels
–
OR
–
these regulators can supply a variable voltage level if under the control of the Radio Control Tool (RCT) as
described in Section 6.1.
The jumper on J47 should be placed in the upper
“
FIXED
”
position when the board is operating in Battery
power mode or when the board is in 5v Line Power mode but is NOT under RCT control. This will pre-set
the 1 volt and 3 volt rails to a fixed 1.0 and 3.3 volts respectively.
The lower position marked
“
RCT
”
should only be selected when a) The J19 FW jumpers are configured to
HCI or
“
Test
”
mode (Section 4), b) the board is being powered in 5 volt Line Power mode and c) when the
board is attached to a PC via both the USB to USB cable and the USB to UART cable and is under the
control of the Radio Control Tool or
“
RCT
”
.
The RCT has the ability to adjust both the 1 volt and 3 volt power rails to the BT4 Radio IP block within the SoC
for various power consumption tests. Setting of the voltage level on either power rail is done by the RCT user
interface.