Reference Manual

Pin signals Recommended pin connections
Digi XBee® 3 RF Module Hardware Reference Manual
30
Pin# Name Direction
Default
state Description
11
DIO4/SPI_MOSI Both Disabled
GPIO/Serial
peripheral interface
data in.
12 CTS/DIO7
Both Output Clear to send flow
control/GPIO.
13 ON/SLEEP/DIO9
Both Output Device status
indicator/GPIO.
14
[reserved] - Disabled Do not connect or
connect to Ground.
15
ASSOCIATE/DIO5 Both Output Associate
Indicator/GPIO.
16 RTS/DIO6
Both Input Request to send
flow control/GPIO.
17 AD3/DIO3/SPI_SSEL
Both Disabled Analog
input/GPIO/SPI not
select.
18
AD2/DIO2/SPI_CLK Both Disabled Analog
input/GPIO/SPI
clock.
19 AD1/DIO1/SPI_ATTN/I2C SCL
Both Disabled Analog
input/GPIO/SPI
attention/I2C SCL.
20
AD0 /DIO0 Both Input Analog input/GPIO/
Commissioning
button.
Signal direction is specified with respect to the device.
This is a complete list of functionalities. See the applicable software manual for available
functionalities.
See Design notes for details on pin connections.
*
The I2C functionality will be software enabled in a future release.
Recommended pin connections
The only required pin connections for two-way communication are VCC, GND, DOUT and DIN. To
support serial firmware updates and recovery, you must connect VCC, GND, DOUT, DIN, RTS, and DTR.
For applications that need to ensure the lowest sleep current, never leave unconnected inputs
floating. Use internal or external pull-up or pull-down resistors, or set the unused I/O lines to outputs.