Lattice Joins ASI SIG, Will Support Advanced Switching Interconnect Standard

Lattice extends PCI Express support with endorsement of emerging interconnect standard for communication, storage, server and embedded platforms

HILLSBORO, OR - July 9, 2004 - Lattice Semiconductor Corporation (NASDAQ: LSCC) today announced it has joined the Advanced Switching Interconnect Special Interest Group (ASI SIG) and will develop products for the emerging backplane interconnect standard. ASI is a standards-based, switched-interconnect and data-fabric architecture based on PCI Express™ technology for connecting system boards and components in future generations of communications, storage, server and embedded platforms. ASI offers developers a broad array of advanced communications features that traditionally have required costly, time-consuming proprietary solutions.

"The market for serial backplane transceivers is growing at an accelerating rate. Until now, systems companies have used XAUI or proprietary architectures for high-speed system backplanes. Advanced Switching Interconnect is significant because it utilizes the existing software infrastructure developed for the PCI standard, while increasing the system throughput and performance gained with the PCI Express architecture," said Stan Kopec, Lattice vice president of corporate marketing. "Lattice is committed to developing products that support ASI, and our recent introduction of a PCI Express IP core is just a first step toward comprehensive ASI support. Leveraging our industry-leading sysHSI™ SERDES technology, already deployed in our ORCA® ORT42G5 and ORT82G5 field programmable system chips, Lattice plans to deliver superior ASI solutions," added Kopec.

"We welcome Lattice Semiconductor to the ASI SIG," said Rajeev Kumar, president of the ASI SIG. "As a leading programmable logic company, Lattice provides silicon components that can speed the deployment of ASI in high-performance backplanes, which are critical in communications, storage and telecom bladed applications. Early adopters of ASI will likely use programmable devices to speed their systems to market, and this industry capability will complement other pre-silicon building blocks available during 2004 in areas such as software simulation, IP, tools and demo's," Kumar added.

About the ASI SIG
The Advanced Switching Interconnect Special Interest Group (ASI SIG) is a non-profit collaborative trade organization tasked with developing and supporting Advanced Switching Interconnect (ASI), a switched interconnect and data fabric interface specification, based on the PCI Express architecture, for communications, storage, and embedded equipment. The ASI SIG's board of directors and members, comprised of industry leading equipment manufacturers and semiconductor and tools vendors, has surpassed 50 members to date. In addition to ongoing technical development of the specification, these member companies help to define, develop and market ASI. Different membership levels provide differing levels of influence, involvement, and responsibility. The overall tasks performed by the SIG members include establishing broad industry awareness, ongoing technical development, and the enablement of rapid industry adoption through training programs, ecosystem development, and interoperability and compliance testing.

The board of directors includes Agere, Alcatel, Huawei, Intel, Siemens and Vitesse. More information can be found at http://www.asi-sig.org/

About Lattice Semiconductor
Lattice Semiconductor Corporation designs, develops and markets the broadest range of Field Programmable Gate Arrays (FPGA), Field Programmable System Chips ( FPSC) and high-performance ISP™ Programmable Logic Devices (PLD), including Complex Programmable Logic Devices (CPLD), Programmable Analog Chips (PAC™), and Programmable Digital Interconnect (GDX™). Lattice also offers industry leading SERDES products. Lattice is "Bringing the Best Together" with comprehensive solutions for today's system designs, delivering innovative programmable silicon products that embody leading-edge system expertise.

Lattice products are sold worldwide through an extensive network of independent sales representatives and distributors, primarily to OEM customers in the fields of communications, computing, computer peripherals, instrumentation, industrial controls and military systems. Company headquarters are located at 5555 NE Moore Court, Hillsboro, Oregon 97124-6421, USA; telephone 503-268-8000, fax 503-268-8037. For more information about Lattice Semiconductor Corporation, visit http://www.latticesemi.com

Statements in this news release looking forward in time are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that forward-looking statements involve risks and uncertainties including market acceptance and demand for our new products, our dependencies on our silicon wafer suppliers, the impact of competitive products and pricing, technological and product development risks and other risk factors detailed in the Company's Securities and Exchange Commission filings. Actual results may differ materially from forward-looking statements.

Lattice Semiconductor Corporation, Lattice (& design), L (& design), GDX, ISP, ORCA, PAC, sysHSI and specific product designations are either registered trademarks or trademarks of Lattice Semiconductor Corporation or its subsidiaries in the United States and/or other countries.

GENERAL NOTICE: Other product names used in this publication are for identification purposes only and may be trademarks of their respective holders.

PCI Express is a trademark of PCI SIG.