Cirrus Logic Selects UMC's Advanced Manufacturing
Services and Technology to Accelerate Time-to-Market Capabilities

HSINCHU, TAIWAN, and AUSTIN, TX, February 4, 2002 - Cirrus Logic, Inc. (Nasdaq: CRUS), the premier supplier of high-performance analog and DSP semiconductor solutions for digital entertainment electronics, and UMC (NYSE: UMC), a world leading semiconductor foundry, today announced the signing of a multi-year manufacturing agreement that establishes UMC as a volume supplier for Cirrus Logic's advanced chip solutions. Under terms of the agreement, Cirrus Logic will have access to UMC's mixed-signal capabilities and precision technologies down to 0.10-micron. Access to these capabilities will accelerate the manufacturing process for some of Cirrus' most advanced products, thus speeding the company's ability to bring new technologies to market.

"UMC's advanced manufacturing services and technologies will play an important role in Cirrus Logic's ability to lead the digital entertainment revolution," said David D. French, president and chief executive officer at Cirrus Logic. "This relationship gives Cirrus Logic a leading mixed-signal process platform from which all of our divisions can plan, develop, and deliver premier products to our customers today and tomorrow."

"We are enthusiastic that Cirrus Logic has selected UMC for the development and manufacturing of its advanced semiconductor products," said Robert Tsao, chairman and CEO at UMC. "UMC is constantly investing to extend its technology and manufacturing capabilities and, as such, our advanced foundry resources are staged to be a valuable asset to Cirrus Logic today and for the years to come. Moreover, we are confident that this relationship will be mutually beneficial in increasing the competitiveness of both our companies."

About Cirrus Logic
Cirrus Logic is the premier supplier of high-performance analog and DSP chip solutions for consumer entertainment electronics that allow people to see, hear, connect, and enjoy digital entertainment. Building on its global market share leadership in audio integrated circuits and its rich mixed-signal patent portfolio, the company targets mainstream audio, video and Internet entertainment applications in the consumer entertainment market. Cirrus Logic operates from headquarters in Austin, Texas and major sites located in Fremont and El Dorado Hills, Calif., Broomfield and Boulder, Colorado, as well as offices in Europe, Japan and Asia. More information about Cirrus Logic is available at www.cirrus.com.

Note From Cirrus Logic Concerning Forward-Looking Statements
Except for historical information contained herein, the matters set forth in this news release are forward-looking statements that are dependent on certain risks and uncertainties including such factors, among others, as the ability of UMC to supply the volume and quality required by the terms of the contract, and the risk factors listed in the company's Form 10-K for the year ended March 31, 2001, and in other filings with the Securities and Exchange Commission. The foregoing information concerning Cirrus Logic's business outlook represents our outlook as of the date of this news release, and Cirrus Logic undertakes no obligation to update or revise any forward-looking statements, whether as a result of new developments or otherwise.

Note From UMC Concerning Forward-Looking Statements
Some of the statements in the foregoing announcement are forward looking within the meaning of the U.S. Federal Securities laws, including statements about future outsourcing, wafer capacity, technologies, business relationships and market conditions. Investors are cautioned that actual events and results could differ materially from these statements as a result of a variety of factors, including conditions in the overall semiconductor market and economy; acceptance and demand for products from UMC; and technological and development risks.

Cirrus Logic is a trademark of Cirrus Logic Inc.

Contacts:

UMC KJ Communications Eileen Elam (650) 917-1488 kjcome@cs.com	Cirrus Logic, Inc. Cirrus Logic, Inc. Jack Taylor (512) 912-3231 jack.taylor@cirrus.com
In Taiwan UMC Alex Hinnawi (886) 2-2700-6999 ext. 6958	In Asia Firebrand Communications John Casey (852) 2122 9752 jcasey@firebrand.com.hk