GSM/UMTS: ROM variants of BlueCore provide the most integrated solutions for motherboard mounting, and interfacing to the phone's host processor via HCI.
DSP-equipped BlueCoreX-Multimedia provides a powerful coprocessing platform for phone CPUs with little spare performance, allowing music file coding/decoding and more.
Activity signalling plus proprietary extra features ensure QoS.
Ready-to-use GPS software product, plus very low cost location solutions for mobile phones and PNDs.
Ready to apply subsystem incorporating Wi-Fi and Bluetooth to add 'dual mode' (cellular + Wi-Fi) capability to cellphones.
Advanced performance with CSR's CVC® software.
BCHS (including support for Linux and WinCE).
Many options.
BlueCore5-FM combines our v2.1 ready Bluetooth solution with an FM radio and RDS.
BlueCore5-FM
Combines the latest (v2.1 ready, plus EDR) radio Bluetooth® with an FM radio - the first ever single chip solution in this area. The FM demodulator comprises an RF receiver, fully integrated VCO, analogue and digital filter stages and a stereo audio output, plus an RDS (radio data system) demodulator. Designed specifically to cope with demanding cellular environments, the adjustment-free stereo decoder allows the baseband processor to be 'turned off' for power conservation when the FM station has been tuned. Unique tonal blocking capabilities eliminates problems of system-generated harmonics interfering with FM reception.
Design information is available and samples may be ordered now (contact your local office for this information).
BlueCoreX-ROM
CSR offers the smallest and most integrated solutions for motherboard mounting and interfacing to the phone's host processor via HCI (or RFCOMM or a custom ROM build). Developers can choose from a variety of packages - including CSP - and benefit from extensive support including example and reference designs. CSR's design information is available free to purchasers of the Casira™ development system. CSR's support also include BlueCore Host Software (BCHS) for the host-side Bluetooth stack and application software:
BlueCore3-ROM: compatible with Bluetooth v1.2. More...
BlueCore4-ROM: compatible with Bluetooth v2.0 + EDR (enhanced data rate), and additionally supports eSCO (extended SCO with error correction). This device (which is pin compatible with BlueCore3) is in mass production and is currently the popular choice for mobile phone developers. More...
More information: (note that you may need to register on CSR's support site (and make a development tool purchase to get some design related information); call your local office if you have any problems)
Example design information available includes:
http://www.csrsupport.com/ReferenceDesigns - generic RF designs
Note: CSR is continually updating its example designs: there may be newer variants available, call your local CSR office to ensure you have the latest information.
BlueCoreX-Multimedia
A
versatile programmable single-chip Bluetooth solution with onchip DSP core and a stereo CODEC, for high-end headset/headphone applications:
BlueCore3-Multimedia - a versatile programmable single-chip v1.2 Bluetooth solution with onchip DSP and stereo CODEC, in variants with an external memory interface, or with onchip Flash memory for general purpose use and development purposes. Also available in CSR's 'Plug-n-Go' package with integral balun, filter and matching. More...
BlueCore5-Multimedia - CSR's next generation Multimedia solution, which is 'v2.1 + EDR' ready, and features an uprated DSP capable of supporting a large range of music CODECs, advanced echo cancellation/Noise Suppression, speech synthesis etc. Full design information is available and samples may be ordered now (contact your local office for this information).
More information: http://www.csrsupport.com/DataSheets (note that you may need to register on CSR's support site (and make a development tool purchase to get some design related information); call your local office if you have any problems).
Coexistence-friendly Wi-Fi and Bluetooth (using UniFi and BlueCore)
Developers co-locating both Bluetooth and Wi-Fi functions inside a very small form factor such as a cellphone have to contend with 'front-end overloading' (an effect caused by the transmission power levels which - when combined with the proximity the embedded system imposes - are enough to saturate or de-sensitise the front end of the nearby RF chain). Co-ordination using time domain multiplexing (TDM) between the two protocols - also known as Activity Signalling - is required to overcome this, and several proprietary schemes have been devised.
CSR's Bluetooth devices such as the EDR-equipped BlueCore4 support all common co-existence measures developed by Wi-Fi silicon vendors. However, as CSR also manufactures the UniFi 802.11 b/g solution for embedded applications, it's been possible to include further optimization measures. CSR has implemented these additional features, because even when current protection techniques are utilised, there are still co-existence issues. Take the example of someone using Bluetooth for voice communication while also surfing the web. The synchronous Bluetooth SCO connection will be disrupted by the packet reception acknowledgements that Wi-Fi is forced to transmit - resulting in bad voice quality for the Bluetooth link.
We have produced hardware which demonstrates that obtaining both devices from CSR provides access to a ready-engineered co-existence solution. Demonstrations include a VoIP call over a Wi-Fi link using a Bluetooth headset; streaming stereo music to Bluetooth headphones while simultaneously browsing the internet or downloading an MP3 file; receiving a phone call over a Bluetooth headset while surfing the internet; and simultaneous transfer of files over Bluetooth and Wi-Fi links. The TDM and proprietary measures built in the UniFi device (with UMA-compliant 17 dBm radio frequency output power) ensure that synchronous Bluetooth HV3 packets do not cause interference.