Reference Manual

XBIB-C development boards XBIB-CU TH reference
Digi XBee® 3 RF Module Hardware Reference Manual
64
Number Item Description
1 Secondary USB
(USB MICRO B)
and DIP Switch
Secondary USB Connector for direct programming of modules on some
XBee units. Flip the Dip switches to the right for I2C access to the
board; flip Dip switches to the left to disable I2C access to the board.
The USB_P and USB_N lines are always connected to the XBee,
regardless of Dip switch setting.
This USB port is not designed to power the module or the board. Do not
plug in a USB cable here unless the board is already being powered
through the main USB-C connector. Do not attach a USB cable here if
the Dip switches are pushed to the right.
WARNING! Direct input of USB lines into XBee units or I2C
lines not designed to handle 5V can result in the destruction
of the XBee or I2C components. Could cause fire or serious
injury. Do not plug in a USB cable here if the XBee device is
not designed for it and do not plug in a USB cable here if the
Dip switches are pushed to the right.
2 Current
Measure
Large switch controls whether current measure mode is active or
inactive. When inactive, current can freely flow to the VCC pin of the
XBee. When active, the VCC pin of the XBee is disconnected from the 3.3
V line on the development board. This allows current measurement to
be conducted by attaching a current meter across the jumper P10.
3 Battery
Connector
If desired, a battery can be attached to provide power to the
development board. The voltage can range from 2 V to 5 V. The positive
terminal is on the left.
If the USB-C connector is connected to a computer, the power will be
provided through the USB-C connector and not the battery connector.
4 USB-C
Connector
Connects to your computer and provides the power for the
development board. This is connected to a USB to UART conversion chip
that has the five UART lines passed to the XBee. The UART Dip Switch
can be used to disconnect these UART lines from the XBee.
5 LED indicator Red: UART DOUT (modem sending serial/UART data to host)
Green: UART DIN (modem receiving serial/UART data from host)
White: ON/SLP/DIO9
Blue: Connection Status/DIO5
Yellow: RSSI/PWM0/DIO10
6 User Buttons Comm DIO0 Button connects the Commissioning/DIO0 pin on the XBee
Connector through to a 10 Ω resistor to GND when pressed.
RESET Button Connects to the RESET pin on the XBee Connector to GND
when pressed.
7 Breakout
Connector
This 40 pin connector can be used to connect to various XBee pins as
shown on the silkscreen on the bottom of the board.