
Hardware
Design notes
XBee/XBee-PRO® S2C ZigBee® RF Module
30
Recommended pin connections
The only required pin connections for two-way communication are VCC, GND, DOUT and DIN. To
support serial firmware updates, you must connect VCC, GND, DOUT, DIN, RTS, and DTR.
Do not connect any pins that are not in use. Use the
PR
command to pull all inputs on the radio high
with internal pull-up resistors. Unused outputs do not require any specific treatment.
For applications that need to ensure the lowest sleep current, never leave unconnected inputs
floating. Use internal or external pull-up or pull-down resistors, or set the unused I/O lines to outputs.
You can connect other pins to external circuitry for convenience of operation including the Associate
LED pin (pin 15) and the Commissioning pin (pin 20). The Associate LED pin flashes differently
depending on the state of the module, and a pushbutton attached to pin 20 can enable various
deployment and troubleshooting functions without you sending UART commands. For more
information, see
Commissioning pushbutton and associate LED
.
For analog sampling, attach the VREF pin (pin 14) to a voltage reference.
Design notes for PCB antenna devices
Position PCB antenna devices so there are no ground planes or metal objects above or below the
antenna. For best results, do not place the device in a metal enclosure, as this may greatly reduce the
range. Place the device at the edge of the PCB on which it is mounted. Make sure the ground, power
and signal planes are vacant immediately below the antenna section.
The following drawings illustrate important recommendations when you are designing with PCB
antenna devices. For optimal performance, do not mount the device on the RF pad footprint described
in the next section, because the footprint requires a ground plane within the PCB antenna keep out
area.
Содержание XBee
Страница 1: ...XBee XBee PRO S2C ZigBee RF Module User Guide ...
Страница 259: ...AT commands Execution commands XBee XBee PRO S2C ZigBee RF Module 259 Parameter range N A Default N A ...
Страница 289: ...Regulatory information ANATEL Brazil XBee XBee PRO S2C ZigBee RF Module 289 ...
Страница 290: ...Regulatory information ANATEL Brazil XBee XBee PRO S2C ZigBee RF Module 290 ...
Страница 303: ...Load ZigBee firmware on 802 15 4 devices Background 304 Load ZB firmware 305 XBee XBee PRO S2C ZigBee RF Module 303 ...