Specifications
Serial communication specifications
Digi XBee® RR RF Module Hardware Reference Manual
25
Serial communication specifications
The XBee RR RF Module supports Universal Asynchronous Receiver / Transmitter (UART) and Serial
Peripheral Interface (SPI) serial connections.
UART pin assignments
UART pins
Device pin number
Micro-mount
DOUT/DIO13
3
DIN / CONFIG/DIO14
4
CTS / DIO7
24
RTS/ DIO6
27
SPI pin assignments
GPIO specifications
XBee RR RF Modules have 15 General Purpose Input / Output (GPIO) ports available. The exact list
depends on the device configuration as some GPIO pads are used for purposes such as serial
communication.
GPIO electrical specification
Value
Input pull-up resistor value
40 k
Ω
(typical)
Input pull-down resistor value
40 k
Ω
(typical)
Output voltage for logic 0
0.2 x VCC (maximum)
Output voltage for logic 1
0.8 x VCC (minimum)
Output source/sink current
50 mA (maximum)
Total output current (for GPIO pads)
200 mA (maximum)
Electro Static Discharge (ESD)
XBee RR RF Module pins are tolerant to human-body model ± 1.5 kV.
Note
Take care to limit all electrostatic discharges to the device.