16 Software
CSR8640 BGA:
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Includes integrated Bluetooth v3.0 specification qualified HCI stack firmware
■
Includes integrated CSR8640 Stereo Headset, with 6
th
generation 2-mic CVC audio enhancements and a
configurable EQ
■
Can be shipped with CSR’s CSR8640 stereo headset development kit for CSR8640 BGA, order code
DK-8640-10061-1A
The CSR8640 BGA software architecture enables Bluetooth processing and the application program to run on the
internal RISC MCU, and the audio enhancements on the Kalimba DSP.
16.1
CSR8640 Stereo Headset
The CSR stereo headset ROM software supports:
■
6
th
generation 2-mic CVC audio enhancements
■
■
■
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A2DP v1.2
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Bluetooth v3.0 specification is supported in the ROM software
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Secure simple pairing
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Proximity pairing (headset-initiated pairing) for greatly simplifying the out-of-box pairing process, for more
information see Section 16.1.8
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For connection to more than 1 mobile phone, advanced Multipoint is supported. This enables a user to take
calls from a work and personal phone or a work phone and a VoIP dongle for Skype users. This has minimal
impact on power consumption and is easy to configure.
■
Most of the CSR8640 stereo headset ROM software features are configured on the CSR8640 BGA using
the Headset Configurator tool. The tool reads and writes headset configurations directly to the EEPROM,
serial flash or alternatively to a PSR file. Configurable headset features include:
■
Bluetooth v3.0 specification features
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Reconnection policies, e.g. reconnect on power-on
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Audio features, including default volumes
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Button events: configuring button presses and durations for certain events, e.g. double press on
PIO[1] for last number redial
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LED indications for states, e.g. headset connected, and events, e.g. power on
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Indication tones for events and ringtones
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HFP v1.6 supported features
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Battery divider ratios and thresholds, e.g. thresholds for battery low indication, full battery etc.
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Advanced Multipoint settings
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Configurable 5-band EQ for music playback (rock, pop, classical, jazz, dance etc)
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SBC, MP3 and Faststream decoder
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Stereo widening (S3D)
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Volume Boost
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USB audio mode for streaming high-quality music from a PC whilst charging, enables the headset to:
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Playback high-quality stereo music, e.g. iTunes
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Use bidirectional audio in conversation mode, e.g. for Skype
Advance Information
This material is subject to CSR's non-disclosure agreement
© Cambridge Silicon Radio Limited 2011
Page 92 of 110
CS-209182-DSP1
CSR8640 BGA
Data Sheet
