Refer to the Getting started section for
details on connecting your wireless components.
Dual Use AD pins
On reset or power up the AD pins are configured as digital
inputs. To change those to ADs, the user must include the AD11.bas library
and call InitAD
All pins can be used for the software PWM function, and 8 pins
can be used for the hardware driven HWPWM function.
One Wire interfacing
The optional RJ-45 connection was designed with the idea of
driving up to 7 one wire sensors, with P0.7 available as a high
current drive that can power up the sensors through a 8 pin SMT (CTS 745C
type) resistor on the back side of the board.
That connector is not limited to that, as I2C, SPI or other
serial options can be used.
Baud rate settings
The XB sensor default baud setting is 19.2Kb, and the default
setting for the Xbee modules are 9600 baud. The Xbee sensor baud rate can
be set with the X-CTU utility from Digi. Some details in the installation
When the USB dongle is connected that takes precedence over the
serial connection on UART0 to the Xbee module. This is done by sensing the
Vin voltage (see the schematic)
The XB sensor primary power supply is 3.3V. This voltage
is available for user circuitry at 3 pins in the prototype area. This can
be derived from either the battery connection, or the mini-B USB
connection. When connected to the USB mini-B connector, a Li-Poly battery
can be charged. The charge current is set at 500 mA. These batteries
are available in various sizes from SparkFun
During debugging, the USB dongle can be connected and it will
supply power to the board through Vin. But the battery should not be
charged this way as it may exceed the current capability of the USB debug
Coridium does not stock the Xbee modules, as there are too many
varieties. We will quote XB sensor boards with Xbee modules for orders of
10 or more boards.
This board is designed to fit into a Polycase LP-11
In addition, the board has been designed to accept optional RJ45
vertical connections using Bel Stewart SS-74301-002 or TE connectivity
5556416, available from Digikey.
Also a vertical power connection can be made with Cui PJ-032A
2.1mm barrel connector.
Space is also provided for a reset