Xbee-Pro 900Hp Pin Signals; Xbee-Pro 900Hp Design Notes; Xbee-Pro 900Hp Power Supply Design; Xbee-Pro 900Hp Recommended Pin Connections - Digi XBee-PRO XSC Manual

XBee‐PRO® 900HP/XBee‐PRO® XSC RF Modules

XBee-PRO 900HP Pin Signals

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.
© 2014 Digi International Inc.
Pin Assignments for XBee Modules
(Low‐asserted signals are distinguished with a horizontal line above signal name.)
Pin # Name
1 VCC
2 DOUT/DIO13
3 DIN/nConfig/DIO14
4 DIO12/SPI_MISO
5 nRESET
6 DIO10/PWM0
7 DIO11/PWM1
8 reserved
9 nDTR/SLEEP_RQ/DIO8
10 GND
11 DIO4/AD4/SPI_MOSI
12 nCTS/DIO7
13 On_nSLEEP/DIO9
14 VREF
15 Associate/DIO5
16 nRTS/DIO6
17 AD3/DIO3/SPI_nSSEL
18 AD2/DIO2/SPI_CLK
19 AD1/DIO1/SPI_nATTN
20 AD0/DIO0
• Signal Direction is specified with respect to the module
• See Design Notes section below for details on pin connections.
Direction Default State
Both Output
Both Input
Both Output
Input
Both
Both
Disabled
Both Input
Both
Both Output
Output Output
Input
Both Output
Both Input
Both
Both
Both
Both
Description
Power Supply
GPIO / UART Data out
GPIO / UART Data In
GPIO / SPI slave out
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.
GPIO / RX Signal Strength Indicator
GPIO / Pulse Width Modulator
Do Not Connect
GPIO / Pin Sleep Control Line (DTR on the dev
board)
Ground
GPIO/SPI slave In
GPIO / Clear-to-Send Flow Control
GPIO / Module Status Indicator
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.
GPIO / Associate Indicator
GPIO / Request-to-Send Flow Control
GPIO / Analog Input / SPI Slave Select
GPIO / Analog Input / SPI Clock
GPIO / Analog Input / SPI Attention
GPIO / Analog Input
12