Pin Signals - Digi XBee-PRO 900 Instruction Manual

XBee‐PRO® 900 OEM RF Modules

Pin Signals

Pin #
1
2
3 DIN / CONFIG
4
5
6 PWM0 / RSSI / DIO10
7
8
9 DTR / SLEEP_RQ/ DIO8
10
11
12
13
14
15 Associate / DIO5/AD5
16
17
18
19
20
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XBee‐PRO® 900 RF Module Pin Number
(top sides shown ‐ shields on bottom)
Pin Assignments for the XBee‐PRO® 900 Modules
(Low‐asserted signals are distinguished with a horizontal line above signal name.)
Name Direction
Vcc -
DOUT Output
Input
DIO12 Either
Input/Open drain
RESET
output
Either
PWM / DIO11 Either
[reserved] -
Either
GND -
DIO4/AD4 Either
CTS / DIO7 Either
ON / SLEEP Output
Vref -
Either
RTS / DIO6 Either
AD3 / DIO3 Either
AD2 / DIO2 Either
AD1 / DIO1 Either
AD0 / DIO0 Either
Design Notes:
• Minimum connections: VCC, GND, DOUT & DIN
• Minimum connections to support serial firmware upgrades: VCC, GND, DIN, DOUT, RTS & DTR
• Signal Direction is specified with respect to the module
• Module includes an internal 5K Ohm resistor to RESET
• Several of the input pull-ups can be configured using the PR command
• Unused pins should be left disconnected
To ensure proper power up, Vcc SLOPE must be superior or equal to 6V/ms.
© 2008 Digi International, Inc.
Description
Power supply
UART Data Out
UART Data In
Digital I/O 12
Module Reset (reset pulse must be at least 100 us. This must
be driven as a open drain/collector. The module will drive this
line low when a reset occurs. This line should never be driven
high.)
PWM Output 0 / RX Signal Strength Indicator / Digital IO
Digital I/O 11
Do not connect
Pin Sleep Control Line or Digital IO 8
Ground
Digital I/O 4
Clear-to-Send Flow Control or Digital I/O 7
Module Status Indicator or Digital I/O 9
This line must be connected if AD sampling is desired. Must be
between 2.6 V and Vcc.
Associated Indicator, Digital I/O 5
Request-to-Send Flow Control, Digital I/O
Analog Input 3 or Digital I/O 3
Analog Input 2 or Digital I/O 2
Analog Input 1 or Digital I/O 1
Analog Input 0, Digital I/O 0
Max Voltage
3.6V
Vcc
5V
Vcc
Vcc
Vcc
Vcc
n/a
5V
0V
Vcc
Vcc
Vcc
Vcc
Vcc
5V
Vcc
Vcc
Vcc
Vcc
7