Rev 002
24
AirPrime XM0110 Development Kit
Daughter Board
AirPrime XM0110 Development Kit
Daughter Board Reference Manual
3.3.
XM0110 Development Kit Daughter Board
Architecture
The following are the components and their features.
3.3.1.
AirPrime XM0110 GPS Module
The GPS Module used is the AirPrime XM0110 from Sierra Wireless. For more details, see [5]
AirPrime XM0110 Product Technical Specifications and Customer Design Guidelines.
3.3.2.
LDO for Active Antenna Supplying
There are 2 type of GPS antenna: Passive antenna and active antenna that integrate an LNA.
The XM0110 Development Kit Daughter Board is designed to use active antenna, so it provides a
3.3V power supply on RF connector. This supply is managed by AirPrime XM0110 firmware (through
EXT_LNA_EN signal) and follows activation and deactivation of XM0110 internal RF chain.
Caution:
In a future software delivery a command to activate and deactivate EXT_LNA_EN signal will be
integrated, but for now, if this supply is undesirable a SMA RF DC-Blocker must be add on RF
connector.
Figure 11. Power supply for GPS Active Antenna
3.4.
Configuration
XM0110 Development Kit Daughter Board uses some resources provided by the Embedded Module
Development Kit and shares supply with it. Therefore some resources are not available on the
Embedded Module Development Kit when XM0110 Development Kit Daughter Board is plugged.
3.4.1.
Interface Configuration
The AirPrime XM0110 can be driven through 2-Wire UART or I2C interface. One jumper is used to
choose an interface type and 2 jumpers are used for switch interface communication signals: