User Manual

XBee®/XBee‐PRO®ZBRFModules
©2011DigiInternational,Inc. 13
Pin Signals
• Signal Direction is specified with respect to the module
• See Design Notes section below for details on pin connections.
PinAssignmentsfortheXBee/XBee‐PROModules
(Low‐assertedsignalsaredistinguishedwithahorizontallineabovesignalname.)
Pin # Name Direction Default State Description
1 VCC - - Power supply
2 DOUT Output Output UART Data Out
3 DIN / CONFIG
Input Input UART Data In
4 DIO12 Both Disabled Digital I/O 12
5 RESET
Both
Open-Collector with
pull-up
Module Reset (reset pulse must be at least 200
ns)
6 RSSI PWM / DIO10 Both Output RX Signal Strength Indicator / Digital IO
7 DIO11 Both Input Digital I/O 11
8 [reserved] - Disabled Do not connect
9DTR
/ SLEEP_RQ/ DIO8 Both Input Pin Sleep Control Line or Digital IO 8
10 GND - - Ground
11 DIO4 Both Disabled Digital I/O 4
12 CTS
/ DIO7 Both Output
Clear-to-Send Flow Control or Digital I/O 7. CTS, if
enabled, is an output.
13 ON / SLEEP
Output Output Module Status Indicator or Digital I/O 9
14 VREF Input -
Not used for EM250. Used for programmable
secondary processor.
For compatibility with other XBEE modules, we
recommend connecting this pin voltage reference
if Analog sampling is desired.
Otherwise, connect to GND.
15 Associate / DIO5 Both Output Associated Indicator, Digital I/O 5
16 RTS
/ DIO6 Both Input
Request-to-Send Flow Control, Digital I/O 6. RTS,
if enabled, is an input.
17 AD3 / DIO3 Both Disabled Analog Input 3 or Digital I/O 3
18 AD2 / DIO2 Both Disabled Analog Input 2 or Digital I/O 2
19 AD1 / DIO1 Both Disabled Analog Input 1 or Digital I/O 1
20
AD0 / DIO0 /
Commissioning Button
Both Disabled
Analog Input 0, Digital IO 0, or Commissioning
Button