User Manual

TETRA Bluetooth Radio Module
Solutions for a Real Time World Datasheet
Re-Tek - xxxx - 14 - 45388 Warm Springs Blvd. Fremont, CA 94539
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Copyright Unigen Corporation, 2011
FUNCTIONAL OVERVIEW
TETRA Hardware Functional Description
The TETRA is a complete Radio Transceiver Module operating in the license free ISM (Industrial
Scientific and Medical) 2.4GHz band. The TETRA module is equipped with a crystal oscillator and
BALUN, Filter and a printed double helix antenna. TETRA incorporates CSR’s BlueCore®
CSR8510 chipset that is fully compliant to the Bluetooth v2.1+EDR, v3.0+HS and v4.0
specifications.
The full speed USB interface, power, and ground lines are connected via a XSR JST, low profile
connector. The USB interface communicates with an external host running the upper Bluetooth
stack defined by the Host Controller Interface (HCI) layer in the Bluetooth specifications. The USB
interface is used to send HCI commands and events to and from the external host to TETRA
module.
Asynchronous and Synchronous Bluetooth data is sent between the module and external host via
the USB interface as well. Asynchronous data is sent and received over an Asynchronous packet
switched RF link defined by the Bluetooth specification as “Asynchronous ConnectionLess” (ACL).
Synchronous data such as audio data uses “Synchronous Connection Oriented” (SCO) circuit
switched RF links defined by the Bluetooth specification. ACL data links can retransmit lost or
corrupted data continuously due to the packet switched connection. SCO data can provide fast
reliable continuous synchronous data over the circuit-switched RF link. SCO over the USB is
supported.