Pin signals
Recommended pin connections
Digi XBee® RR RF Module Hardware Reference Manual
33
Pin#
Name
Direction
Default
state
Description
flow control
/GPIO.
28
AD3/DIO3
Both
Disabled
Analog
input/GPIO.
29
AD2/DIO2
Both
Disabled
Analog
input/GPIO.
30
AD1/DIO1/I2C SCL
Both
Disabled
Analog
input/GPIO/I2C
SCL.
31
AD0 /DIO0
Both
Input
Analog input /
GPIO /
Commissioning
button.
32
GND
-
-
Ground.
33
RF
Both
-
RF I/O for RF pad
variant.
34
GND
-
-
Ground.
Signal direction is specified with respect to the device.
This is a complete list of functionalities. See the applicable software manual for available
functionalities.
Note
There are three RF test points located on the bottom of the device. Do not connect these test
points. For more information, see
See
for details on pin connections.
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.
