ARC International Passes 100th Licensee Milestone

Power of ARC's Patented Configurable Processor Technology Recognized Throughout Global SoC Design Industry

ELSTREE, England, June 15, 2005 – ARC International (LSE: ARK), the world leader in configurable CPU/DSP processor cores and application subsystems, today announced that it has exceeded 100 licensees of its patented configurable SoC technology. ARC International passed this milestone because of the growing demand by silicon designers for configurable processor cores and subsystems that enable the design of value-added and cost-effective SoCs ideally suited for high-volume applications. ARC's licensees include systems OEMs and semiconductor companies, such as Broadcom, Fujitsu, Infineon, IPWireless, LeapFrog, SanDisk, Siano Mobile Silicon, Sony, UPEK and TTPCom.

"ARC International is leading the configurable revolution by providing patented technology for configurable SoC solutions which combine maximum product differentiation with optimum cost-efficiency," said Derek Meyer, vice president of marketing for ARC International. "ARC's growing licensee list of more than 100 individual companies underscores the increasing adoption of configurable technology for the design of a range of consumer, storage and networking applications."

ARC's Patented Configurable Technology
ARC's configurable processor technology enables designers to create SoCs that are highly optimized to the end application. Using ARC's easy-to-use ARChitect™ Processor Configurator, licensees can reduce overall die size and power consumption by removing unneeded features in the core. Designers also can greatly increase application efficiency by defining custom extensions to accelerate critical code using ARC's Extension Wizard. The result is a cost-effective SoC, optimized for low power and application performance.

About ARC International plc
ARC International is the world leader in low-power, high-performance 32-bit configurable CPU/DSP processor cores, subsystems, real-time operating systems and development tools for embedded system design. ARC's patented configurable and extendible cores assist customers in the development of next generation digital media, consumer and communications devices, resulting in lower cost, higher performance SoC products.

ARC International maintains a worldwide presence with corporate offices in San Jose, California, USA and Elstree, UK. The company has research and development offices located in England and the United States. For more information please visit the ARC website at: www.ARC.com. ARC International is listed on the London Stock Exchange as ARC International plc (LSE: ARK).

ARC, the ARC logo and ARChitect are trademarks or registered trademarks of ARC International. All other brands or product names contained herein are the property of their respective owners. This press release may contain certain "forward-looking statements" that involve risks and uncertainties. For factors that could cause actual results to differ, visit the company's Website as well as the listing particulars filed with the United Kingdom Listing Authority and the Registrar of Companies in England and Wales.