Xlr Pro Direct Voltage Supply Input - Digi XLR PRO User Manual

Getting started with the XLR PRO RF Module
Switch position
High
Low
Middle
If the switch is high, the XLR PRO module is enabled. If the switch is low, the XLR PRO module is put
into shutdown. The middle position could mean the XLR PRO module is enabled or in shutdown,
depending on how a line is pulled on the USB bridging chip on the development board.
High: the XLR PRO module is enabled (not in shutdown mode).
Low: the XLR PRO module is disabled (in shutdown mode).
Middle: a state where shutdown mode for the XLR PRO module could be software selected.
FTDI pin 53 (signal name FTDI_SEL_ON_WRITE) is the line that determines whether or not shutdown
mode is enabled. A pull up resistor makes the default value of this line high (XLR is in shutdown).

XLR PRO direct voltage supply input

CAUTION! When using the direct voltage supply input you risk damaging the XLR PRO
module. Any voltage higher than 5.5 V risks damaging the XLR PRO module.
There are two ways to power the XLR PRO module on the development board: through the Phoenix
connector or the terminal blocks. The green Phoenix connector powers an on-board regulator which
regulates down to 5 V and is passed to the module. You can use the blue terminal blocks labeled J6 on
the bottom right of the board to power the XLR PRO module directly. You can select the inputs using
SW3. When SW3 is slid to the left, the Phoenix connector powers the XLR PRO module, and when it is
slid to the right the terminal blocks power the XLR PRO module.
XLR PRO Radio Frequency (RF) Module User Guide
FTDI_SEL_ON_WRITE
X
X
Low
High
Development Board for the XLR PRO RF Module
XLR_SHUTDOWN
Module 3.3V_OUT Enabled
High Yes
Low No
High Yes
Low No
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