Specifications

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3.7. Bluetooth Module
The EM-X270 Bluetooth system is based on the CSR BlueCore 4-ROM component.
The BlueCore 4-ROM is a single-chip radio and baseband IC for Bluetooth 2.4GHz
systems including enhanced data rates (EDR) to 3Mbps.
With the on-chip CSR Bluetooth software stack, it provides a fully-compliant Bluetooth
system to v2.0 of the specification for data and voice communications.
Features:
 Fully Compliant Bluetooth v2.0+EDR system
 Enhanced Data Rate (EDR) compliant with v2.0 of specification for both 2Mbps and
3Mbps modulation modes
 Full Speed Bluetooth Operation with Full Piconet Support
 Scatternet Support
The BlueCore 4-ROM is connected to the PXA270 processor USB host port through the
USB hub.
Antenna Connection
The EM-X270 features a small on-board ceramic patch antenna dedicated to Bluetooth
connectivity. Alternatively, an external antenna may be connected via the on-board UFL
high frequency connector. See section 4.12 for a detailed connector description.
Note: The external antenna cannot operate together with the on-board patch antenna. In
order to use an external Bluetooth antenna, the on-board antenna must be disabled.
RF Specification
Standards IEEE 802.15.1
BlueTooth Class Class II device
Wireless Signal Rates 2.1Mbps (Bluetooth 2.0)
Wireless Transmit Power* 4dBm
Wireless Operating Range* Up to 10m
Receiver Sensitivity* -84dBm
* Preliminary data
LED Indication
The onboard LED DS5 indicates BlueTooth transceiver activity.