XBIB-U-DEV reference

This picture shows the XBee USB XBIB-U-DEV development board and the table that follows explains the call-outs in the picture.

Number	Item	Description
1	Programming header	Header used to program XBee programmable devices.
2	Self power module	Advanced users only—voids the warranty. Depopulate R31 to power the device using V+ and GND from J2 and J5. You can connect sense lines to S+ and S- for sensing power supplies.
2	Self power module	CAUTION: Voltage is not regulated. Applying the incorrect voltage can cause fire and serious injury.1
3	Current testing	Depopulating R31 allows a current probe to be inserted across P6 terminals. The current though P6/R31 powers the device only. Other supporting circuitry is powered by a different trace.
4	Loopback jumper	Populating P8 with a loopback jumper causes serial transmissions both from the device and from the USB to loopback.
5	DC barrel plug: 6-20 V	Greater than 500 mA loads require a DC supply for correct operation. Plug in the external power supply prior to the USB connector to ensure that proper USB communications are not interrupted.
6	LED indicator	Yellow: Modem sending serial/UART data to host. Green: Modem receiving serial/UART data from host. Red: Associate.
7	USB	Connects to your computer.
8	RSSI indicator	See RSSI PWM. On the XBIB-U, more lights are better.
9	User buttons	Connected to DIO lines for user implementation.
10	Reset button	Press the reset button to reset the device to the default configuration.
11	SPI power	Connect to the power board from 3.3 V.
12	SPI	Only used for surface-mount devices.
13	Indicator LEDs	DS5: ON/SLEEP DS2: DIO12, the LED illuminates when driven low. DS3: DIO11, the LED illuminates when driven low. DS4: DIO4, the LED illuminates when driven low.
14	Through-hole XBee sockets	Connects the Digi XBee 3® Cellular LTE-M/NB-IoT modem to the XBee USB development board.
15	20-pin header	Maps to standard through-hole XBee pins. Male, Samtec header, part number: TSW-110-26-L-D. 2.54 mm / .100" pitch and row spacing.