SiRF and CSR to Merge Creating a Global Leader in Connectivity and Location
Platforms

Transaction Valued at $2.06 Per Share Representing a 91% Premium to SiRF
Stockholders

  PR Newswire

  SAN JOSE, Calif., Feb. 10

SAN JOSE, Calif., Feb. 10 /PRNewswire-FirstCall/ -- SiRF Technology Holdings,
Inc. (Nasdaq: SIRF), a leading provider of GPS-enabled silicon and premium
software location platforms, today announced a definitive agreement under
which SiRF and CSR plc (LSE: CSR) will merge in a stock-for-stock transaction
to create a global leader in connectivity and location platforms. The Boards
of Directors of both companies have unanimously approved the transaction,
which is expected to close in the second quarter of 2009.

CSR is a global leader in the Bluetooth connectivity business with core
expertise in multiple connectivity technologies, while SiRF is a leader in the
GPS location business with core expertise in GNSS and multifunction system-on-
chip (SoC) location platforms. This strategic combination of market leaders
will create a global company with significant commercial, operational and
technical scale, uniquely positioned to capitalize on the large and growing
multifunction consumer electronics market opportunity for connectivity and
location technologies. Based on CSR's and SiRF's results for fiscal year 2008,
on a pro forma basis, the combined companies would have had sales of
approximately $927 million. The combination will create the single largest
pure play provider of integrated connectivity and location platforms and will
be one of the top 10 fabless semiconductor companies in the world. Customers
of the combined company include four of the top five handset manufacturers,
the top five personal navigation device makers, the top two auto-telematics
suppliers, and other leading auto and consumer electronics providers. CSR and
SiRF will have design and customer support centers located around the world.

Under the terms of the agreement, SiRF stockholders will receive 0.741 of a
CSR share for each share of SiRF common stock they own. Based on the closing
stock price for CSR on February 9, 2009, this consideration would be
equivalent to $2.06 of CSR stock for each SiRF share, representing total
consideration of $136 million. This represents a premium to SiRF stockholders
of approximately 91% over SiRF's closing stock price on February 9, 2009. Upon
closing of the transaction, SiRF stockholders are expected to own
approximately 27% and CSR shareholders are expected to own approximately 73%
of the combined company. The transaction is expected to be tax-free for SiRF
stockholders.

Dado P. Banatao, Executive Chairman of the Board and Interim CEO of SiRF,
said, "This transaction unites two market and technology leaders in their
respective fields who together will be able to deliver a broad portfolio of
innovative products that are critical to the rapid evolution of consumer
electronics, mobile phones, mobile computers and automotive devices. Our
market opportunity is being driven by growing consumer demand for greater
functionality. Our ability to offer customers both leading edge location and
connectivity technologies will be a key competitive advantage. Together with
CSR, we can accelerate our strategic plans, realize growth opportunities
faster than either company could on its own, diversify our revenues and
capitalize on market opportunities to create value for shareholders."

Commenting on the merger, Joep van Beurden, CEO of CSR, said, "Financially,
strategically and commercially, this is a compelling transaction. We expect it
to be significantly accretive, to enhance the enlarged group's financial
strength and cash position and to create new and wider revenue opportunities
that neither party on its own could pursue as effectively. Strategically, this
deal considerably strengthens our leadership position in the Connectivity
Centre, a strategy which we believe encapsulates the way our marketplace is
developing. Commercially, there is a powerful, complementary fit between the
technologies, skill sets and customer relationships of both companies and the
way we both see our customers' needs evolving. Together we create a group
substantially better placed both to meet the challenges of today and to emerge
even stronger from the current testing market conditions."

Kanwar Chadha, SiRF's founder, Board member and Vice President of Marketing,
said, "This merger unites two companies with a shared market vision and
equally strong commitments to innovation, customers, shareholders and
employees. CSR is the right partner to create additional growth opportunities
for our company, and we believe that both our companies will benefit
significantly by being part of a larger, dynamic and growing organization.
Both companies have successfully competed against much larger companies in
their respective fields, and we believe that this transaction, which combines
our innovative technologies, will significantly enhance competition in the
marketplace. We will take advantage of the strengths of each company to take
our business to the next level, and we look forward to working with the CSR
team to ensure an effective and seamless transition."

Benefits of the Transaction

-- Combined Product Roadmap Offers Compelling Next Generation Solutions. The
combined company will have significant R&D resources to deliver a broader
portfolio of innovative location and connectivity solutions to customers.
SiRF's and CSR's respective teams of industry-leading experts will drive
innovation, including the ability to meet the significant customer demand for
high performance location and connectivity features on smaller, lower power
chips. R&D efforts will continue to support each company's existing product
lines and will also be focused on the delivery of additional multifunction
radio chips, which combine CSR's Bluetooth and other connectivity capabilities
with SiRF's GPS and GNSS technologies.

-- Enhanced Ability to Capture Growing Market Opportunities and Create
Significant Revenue Synergies. Combined, SiRF and CSR will be well-positioned
to capitalize on the large and growing market opportunities for each company's
product offerings. The combined company will benefit from significantly
increased scale to meet the demand for both connectivity and location services
in a broad range of products spanning mobile phones, automobiles, personal
computers, mobile internet devices, digital cameras, mobile gaming and other
consumer electronics products. Furthermore, the companies expect to achieve
significant additional revenue synergies beginning in 2010 and beyond through
a combination of cross-selling opportunities, deeper penetration of existing
customers, new product offerings combining complementary technologies and
access to new markets.

-- Combination Delivers Significant Financial Synergies. The companies expect
a combination of CSR and SiRF will deliver significant cost savings from gross
margin improvements and reduced R&D, sales and marketing and overhead costs.
The companies expect that annual cost synergies of at least $35 million can be
achieved through steps that can be implemented within 60 days post completion
of this transaction.

-- Enhances Financial Strength and Flexibility. The combined company is
expected to have a strong balance sheet and cash position. At the end of
fiscal year 2008, on a pro forma basis, the combined company had $378 million
in cash and no bank debt.

Following the close of the transaction, CSR's Board of Directors will be
expanded to add two members of the SiRF Board, Messrs. Banatao and Chadha. Mr.
van Beurden will lead the combined company as Chief Executive Officer with the
remaining leadership to be comprised of executives from both SiRF and CSR. The
combined company will be headquartered in Cambridge (United Kingdom), and
SiRF's San Jose, California headquarters will become the headquarters for
CSR's U.S. operations.

The transaction is subject to regulatory approvals, including expiration or
termination of the applicable waiting period under the Hart-Scott-Rodino
Antitrust Improvements Act, SEC registration of CSR's shares and other
customary closing conditions. The transaction is also subject to the approval
of SiRF and CSR shareholders.

CSR is currently listed on the London Stock Exchange. Upon closing of the
transaction, CSR will provide a facility to enable U.S. shareholders to trade
their shares.

Goldman, Sachs & Co. and Simpson Thacher & Bartlett LLP acted as financial
advisor and legal counsel for SiRF, respectively.

Conference Call Details

SiRF will host a conference call on February 10, 2009, at 8:00 AM Eastern Time
/ 5:00 AM Pacific Time to discuss this announcement, in addition to the
Company's fourth quarter and full-year 2008 financial results, which were
separately announced. This event is available through the SiRF Technology web
site at www.sirf.com by clicking on the "Investors" link.

Listeners should go to the website at least ten minutes before the event to
download and install any necessary audio software. For those unable to attend
the live broadcast, an archived version of the webcast will be available for
one month.

The call can also be heard by dialing (800) 894-5910 (domestic) or (785)
424-1052 (international) and entering the conference id: SIRF. A telephonic
replay will also be available approximately 2 hours following the earnings
call and will be available for two weeks. The telephone playback of the
conference call can be accessed by dialing (800) 374-0934.

About SiRF Technology Holdings, Inc.

SiRF Technology Holdings, Inc. (NASDAQ:SIRF) develops and markets
multifunction location platforms based on semiconductor and software products
that are designed to enable location-awareness utilizing GPS and other
location technologies, enhanced by wireless connectivity and multimedia
capabilities, for high-volume mobile consumer devices and commercial
applications. SiRF's technology has been integrated into a wide range of
mobile consumer devices such as automobile navigation and telematics systems,
portable navigation devices (PNDs), mobile phones, mobile computers, mobile
internet devices, handheld and wearable GPS recreational devices, digital
cameras and camcorders, mobile gaming devices, child and pet trackers, and
GPS-based peripherals, as well as into commercial applications such as
logistics management systems, enterprise and carrier LBS servers, asset
tracking devices, and fleet management systems. For more information see
www.sirf.com.

About CSR

CSR is a leading global provider of wireless voice and data communications
focussing on the Connectivity Centre and its product portfolio covers
Bluetooth, GPS, FM and Wi-Fi (IEEE802.11). CSR offers developed
hardware/software solutions based around its silicon platforms that
incorporate fully integrated radio and microcontroller elements. CSR's
customers include industry leaders such as Audi, Ford, LG, Motorola, NEC,
Nokia, Panasonic, RIM, Samsung, Sharp, Sony, TomTom and Toshiba. CSR has its
headquarters and offices in Cambridge, UK, and offices in Japan, Korea,
Taiwan, China, India, France, Denmark, Sweden and both Dallas and Detroit in
the USA. More information can be found at www.csr.com.

Forward-Looking Statements

This communication contains "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995 which represent the
current expectations and beliefs of management of SiRF Technology Holdings,
Inc. ("SiRF") concerning the proposed merger of SiRF with SiRF Acquisition
Sub, Inc., a direct, wholly-owned subsidiary of CSR ("CSR") (the "merger") and
other future events and their potential effects on SiRF, including, but not
limited to, statements relating to anticipated financial and operating
results, the companies' plans, objectives, expectations and intentions, cost
savings and other statements, including words such as "anticipate," "believe,"
"plan," "estimate," "expect," "intend," "will," "should," "may," and other
similar expressions. Such statements are based upon the current beliefs and
expectations of our management, are not guarantees of future results and are
subject to a significant number of risks and uncertainties. Actual results may
differ materially from the results anticipated in these forward looking
statements. The risks and uncertainties we face include, without limitation:
the ability to obtain the approval of the transaction by SiRF's stockholders
and CSR's shareholders; the ability to obtain governmental approvals of the
transaction or to satisfy other conditions to the transaction on the proposed
terms and timeframe; the possibility that the merger does not close when
expected or at all, or that the companies may be required to modify aspects of
the merger to achieve regulatory approval; the ability to realize the expected
cost and revenue synergies from the transaction in the amounts or in the
timeframe anticipated; the ability to integrate SiRF's businesses into those
of CSR's in a timely and cost-efficient manner; the development of the markets
for SiRF's and CSR's products, the combined company's ability to develop and
market a multifunction radio product containing our GPS-based location
technology and CSR's Bluetooth technology in a timely fashion; weak current
economic conditions, uncertain future economic conditions, and the difficulty
in predicting sales, even in the short-term; factors affecting the quarterly
results of SiRF, CSR and the combined Company, sales cycles, price reductions,
dependence on and qualification of foundries to manufacture the products of
SiRF, CSR and the combined company, production capacity, the ability to
adequately forecast demand, customer relationships, the ability of SiRF, CSR
and the combined company to compete successfully, our product warranties, the
impact of legal proceedings, the impact of the intellectual property
indemnification practices of SiRF, CSR and the combined company; and other
risks and uncertainties, including those detailed from time to time in our
periodic reports filed with the Securities and Exchange Commission, including
our Current Reports on Form 8-K, Quarterly Reports on Form 10-Q and Annual
Report on Form 10-K. In particular, we refer you to "Item 1A. RISK FACTORS" of
our Quarterly Report on Form 10-Q for the quarter ended September 27, 2008
filed with the Securities and Exchange Commission, for additional information
regarding the risks and uncertainties discussed above as well as additional
risks and uncertainties that may affect our actual results. The forward-
looking statements in this communication are qualified by these risk factors.
Each statement speaks only as of the date of this communication (or any
earlier date indicated in this communication) and SiRF undertakes no
obligation to update or revise any forward-looking statements to reflect
subsequent events or circumstances. Investors, potential investors and others
should give careful consideration to these risks and uncertainties.

Additional Information and Where to Find It

This communication may be deemed to be solicitation material in respect of the
proposed merger transaction involving SiRF and CSR. In connection with the
proposed merger, CSR intends to file with the Securities and Exchange
Commission ("SEC") a Registration Statement on Form F-4 containing a proxy
statement/prospectus for the stockholders of SiRF and each of SiRF and CSR
plan to file other documents with the SEC regarding the proposed merger
transaction. The definitive proxy statement/prospectus will be mailed to
stockholders of SiRF. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, SIRF'S
STOCKHOLDERS AND INVESTORS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS
AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN
THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT
THE PROPOSED MERGER. THIS ANNOUNCEMENT DOES NOT CONSTITUTE, OR FORM PART OF,
AN OFFER TO SELL, OR THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES.

Investors and stockholders will be able to obtain, without charge, a copy of
the proxy statement/prospectus, as well as other relevant documents containing
important information about SiRF and CSR at the SEC's website
(http://www.sec.gov) once such documents are filed with the SEC. SiRF's
stockholders will also be able to obtain, without charge, a copy of the proxy
statement/prospectus and other relevant documents when they become available
by directing a request by mail or telephone to SiRF, 217 Devcon Drive, San
Jose, CA, 95112-4211, Attention: Investor Relations, +1 (408) 392-8480 or CSR,
Unit 400, Cambridge Science Park, Milton Road, Cambridge, CB4-0WH, United
Kingdom, Attention: Investor Relations, +44 (0) 1223 692 000.

SiRF and its directors and executive officers, CSR and its directors and
executive officers and other persons may be deemed to be participants in the
solicitation of proxies from SiRF's stockholders with respect to the proposed
merger. Information about SiRF's directors and executive officers and their
ownership of SiRF's common stock is set forth in SiRF's annual report on Form
10-K for the fiscal year ended December 31, 2007 and SiRF's revised proxy
statement for its 2008 annual meeting of stockholders, which was filed with
the SEC on Schedule 14A on July 3, 2008. SiRF has been informed by CSR that
none of CSR's directors and executive officers holds any direct or indirect
interests in SiRF. Stockholders may obtain additional information regarding
the interests of SiRF and its directors and executive officers and CSR and its
directors and executive officers in the proposed merger, which may be
different than those of SiRF's stockholders generally, by reading the proxy
statement/prospectus and other relevant documents regarding the proposed
merger, when filed with the SEC.

SOURCE SiRF Technology Holdings, Inc.

Website: http://www.sirf.com
Website: http://www.csr.com
Contact: investors and shareholders, Dennis Bencala, Chief Financial Officer
of SiRF Technology Holdings, Inc., +1-408-392-8314, dbencala@sirf.com; or
financial & business media, Joele Frank, Wilkinson Brimmer Katcher, or Judith
Wilkinson, Tim Lynch, +1-212-355-4449; or trade media, Lori Evans of Evans
Public Relations, +1-650-200-5891, lori@evanspublicrelations.com, for SiRF
Technology Holdings, Inc.