BCM4330 Preliminary Data Sheet
eSCO
eSCO
In this use case, the stereo FM audio is downsampled to 8 kHz and a mono or stereo stream is then sent
through the Bluetooth eSCO link to a remote Bluetooth device, typically a headset. Two Bluetooth voice
connections must be used to transport stereo.
Wide Band Speech Link
In this case, the stereo FM audio is downsampled to 16 kHz and a mono or stereo stream is then sent through
the Bluetooth wideband speech link to a remote Bluetooth device, typically a headset. Two Bluetooth voice
connections must be used to transport stereo.
A2DP
In this case, the stereo FM audio is encoded by the on-chip SBC encoder and transported as an A2DP link to a
remote Bluetooth device. Sampling rates of 48 kHz, 44.1 kHz, and 32 kHz joint stereo are supported. An A2DP
“lite” stack is implemented in the BCM4330 to support this use case, which eliminates the need to route the
SBC-encoded audio back to the host to create the A2DP packets.
Dynamic Antenna Switching
The BCM4330 includes a circuit to detect the presence of ground-coupled antenna.
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BROADCOM
BCM4330 Preliminary Data Sheet
April 28, 2011 • 4330-DS304-RI
Page 67
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