''Bluetooth Support in Windows XP to Accelerate Growth and Awareness of Bluetooth,'' Says CSR.

Business Editors, High-Tech Writers

RICHARDSON, Texas--(BUSINESS WIRE)--Sept. 30, 2002

CSR (Cambridge Silicon Radio), the Bluetooth(TM) wireless technology industry leader, today stated that Microsoft Corp.'s update to its Windows XP operating system, to include full support for Bluetooth, is the most significant step so far towards the technology's mainstream adoption.

This will enable millions of users of Windows to communicate via Bluetooth with mice, keyboards, mobile phones, networks, and other Bluetooth-enabled devices, in a familiar and simple manner. CSR, which has over 57% of v1.1 qualified Bluetooth designs, foresees acceleration in demand for Bluetooth hardware.

CSR has a long and successful history of working with Microsoft to develop Bluetooth support for Windows. In May this year, CSR announced that Microsoft selected BlueCore(TM), its single-chip Bluetooth technology, for its mouse and keyboard products featuring Bluetooth wireless technology. BlueCore was also selected by Microsoft as a test Radio for the Designed for Windows Logo Program. In November last year, Microsoft provided support for Bluetooth devices based on CSR's technologies, including USB dongles, and CF cards using CSR's BlueCore Serial Protocol (BCSP) host controller interface in its latest version of the Windows CE .NET operating system. This allows developers to more easily design the next generation of Bluetooth-enabled devices

such as PDAs.

Eric Janson, vice president CSR North America commented, "This is the announcement the Bluetooth industry has been waiting for. It brings Bluetooth into the mainstream. This complements the role Bluetooth has already achieved in the mobile phone market. Making wireless communications via Bluetooth transparent to the user paves the way to accelerate the expansion of the Bluetooth market."

Michael W. Foley, Wireless Architect, Microsoft Corporation, added, "Microsoft is committed to delivering an excellent out-of-the-box user experience through Bluetooth support in Windows XP and with our new mouse and keyboard line. Companies such as CSR have brought Bluetooth technology to a level of maturity that made a compelling case for it to be supported in our latest version of Windows XP."

About CSR

CSR (Cambridge Silicon Radio) specializes in providing single-chip radio devices to the global market for short-range wireless communications, including Bluetooth(TM). The company's mission is to create the most highly integrated radio devices available, fabricated using standard CMOS technology, to provide its customers with the lowest cost of ownership of high quality digital radio.

CSR was the first company in the world to offer a true single-chip Bluetooth solution with BlueCore, a fully integrated 2.4 GHz radio, baseband and microcontroller. In Q4 2001 CSR released BlueCore2, its second generation family, and offer developed hardware/software bundles for each of the fastest growing Bluetooth applications markets. Users can combine the chips with the CSR Bluetooth software stack to provide a fully compliant solution for data and voice communications or, used with an upper layer host software stack, CSR is able to offer a complete Bluetooth end-to-end solution.

CSR has a growing list of major international companies including Microsoft Corp, Samsung, Sony, Compaq, IBM, Fujitsu, LG, ALPS, TDK, 3Com, Mitsumi, Siemens and Motorola, who have already used CSR's BlueCore in the development of a range of Bluetooth products. In fact, 70% of available pre-qualified modules, as listed on the qualified products page of the Bluetooth Special Interest Group (SIG) web site, feature BlueCore and it is in 57% of all qualified Bluetooth v1.1 enabled end product designs.

CSR is headquartered in Cambridge, UK, with offices in Richardson, Texas; Tokyo, Japan; Singapore and Aalborg, Denmark.

More information about CSR can be found on the web site at www.csr.com

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