CSR Announces that Microsoft Uses CSR's BlueCore2 for Wireless Desktop; Microsoft Mouse and Keyboard Announced at WinHEC to be Powered by CSR Chips.

Business Editors, Technology Writers

RICHARDSON, Texas--(BUSINESS WIRE)--May 1, 2002

CSR (Cambridge Silicon Radio) has announced that its second generation BlueCore(TM)2, single-chip Bluetooth(TM) wireless technology solution including CSR mouse software, will be used by Microsoft Corp. for its next generation wireless mouse and keyboard.

This cooperation is poised to develop the Microsoft wireless desktop solution along with a USB transceiver, announced by Microsoft Chairman Bill Gates at the recent WinHEC Developers Conference in Seattle. The desktop includes a Bluetooth-enabled mouse, keyboard and transceiver, allowing users to quickly and easily create a personal area network (PAN) of up to seven separate devices. The small footprint and full functionality of CSR's BlueCore(TM) chips were key elements in their selection by Microsoft.

CSR has been working with Microsoft since last year to develop Designed for Windows Logo Program certification tests for Bluetooth. This latest cooperation reinforces the commitment of the two companies to work together to develop Bluetooth solutions.

"CSR is excited to be working with Microsoft on the Designed for Windows Logo Program Bluetooth compatibility tests and to be used as a radio for Microsoft's new Bluetooth products. It further boosts the whole Bluetooth industry by demonstrating the increasing commitment of Microsoft to commercialize Bluetooth products," said Kristine Overlaur, senior technical marketing manager and Microsoft program manager at CSR. "These new Microsoft Bluetooth products will set the standard in ease of use and interoperability for Bluetooth PC peripherals."

"The CSR developed radio is an important component contributing to Microsoft's ability to offer Bluetooth mouse products and keyboards," said Craig Ranta, wireless hardware architect at Microsoft. "The development efforts of CSR engineers will ultimately support the Bluetooth development community in delivering a variety of compelling wireless solutions to Windows XP customers."

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 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, up to the end of 2001, 70% of available pre-qualified modules, as listed on the qualified products page of the Bluetooth Special Interest Group (SIG) web site, feature BlueCore01 and it is in 60% of all qualified Bluetooth v 1.1 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.