Digi XBEE-PRO S3B Manual

XBee‐PRO®900HP/XBee‐PRO®XSCRFModules
©2014DigiInternationalInc. 12
XBee-PRO 900HP Pin Signals
• Signal Direction is specified with respect to the module
• See Design Notes section below for details on pin connections.
XBee-PRO 900HP Design Notes
The XBee modules do not specifically require any external circuitry or specific connections for proper
operation. However, there are some general design guidelines that are recommended for help in
troubleshooting and building a robust design.
XBee-PRO 900HP Power Supply Design
Poor power supply can lead to poor radio performance, especially if the supply voltage is not kept within
tolerance or is excessively noisy. To help reduce noise, we recommend placing both a 1F and 47pF capacitor
as near to pin 1 on the PCB as possible. If using a switching regulator for your power supply, switching
frequencies above 500kHz are preferred. Power supply ripple should be limited to a maximum 50mV peak to
peak.
Note – For designs using the programmable modules, an additional 10F decoupling cap is recommended near
pin 1 of the module. The nearest proximity to pin 1 of the three caps should be in the following order: 47pf,
1F followed by 10F.
XBee-PRO 900HP Recommended Pin Connections
The only required pin connections are VCC, GND, DOUT and DIN. To support serial firmware updates, VCC,
GND, DOUT, DIN, RTS, and DTR should be connected.
PinAssignmentsforXBee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/DIO13 Both Output GPIO / UART Data out
3 DIN/nConfig/DIO14 Both Input GPIO / UART Data In
4 DIO12/SPI_MISO Both Output GPIO / SPI slave out
5 nRESET Input
Module Reset. Drive low to reset the module. This
is also an output with an open drain configuration
with an internal 20 K ohm pull-up (never drive to
logic high, as the module may be driving it low).
The minimum pulse width is 1 mS.
6 DIO10/PWM0
Both GPIO / RX Signal Strength Indicator
7 DIO11/PWM1 Both GPIO / Pulse Width Modulator
8 reserved Disabled Do Not Connect
9 nDTR/SLEEP_RQ/DIO8 Both Input
GPIO / Pin Sleep Control Line (DTR on the dev
board)
10 GND Ground
11 DIO4/AD4/SPI_MOSI Both GPIO/SPI slave In
12 nCTS/DIO7 Both Output GPIO / Clear-to-Send Flow Control
13 On_nSLEEP/DIO9 Output Output GPIO / Module Status Indicator
14 VREF Input
Internally used for programmable secondary
processor. For compatibility with other XBee
modules, we recommend connecting this pin to the
voltage reference if Analog Sampling is desired.
Otherwise, connect to GND.
15 Associate/DIO5 Both Output GPIO / Associate Indicator
16 nRTS/DIO6 Both Input GPIO / Request-to-Send Flow Control
17 AD3/DIO3/SPI_nSSEL Both GPIO / Analog Input / SPI Slave Select
18 AD2/DIO2/SPI_CLK Both GPIO / Analog Input / SPI Clock
19 AD1/DIO1/SPI_nATTN Both GPIO / Analog Input / SPI Attention
20 AD0/DIO0 Both GPIO / Analog Input

Digi XBEE-PRO S3B Specifications

General

Brand	Digi
Model	XBEE-PRO S3B
Category	Control Unit
Language	English