Lattice Partners With CAST for IP Cores

- CAST, Inc., Founding Member of Lattice's ispLeverCORE™ Connection Program, Optimizes Their IP Cores for Lattice's ispXPGA™ and ORCA FPGA/FPSC Devices -

HILLSBORO, OR - SEPTEMBER 2, 2003 - Lattice Semiconductor Corporation (NASDAQ: LSCC) today announced that semiconductor intellectual property (IP) provider CAST, Inc. is a founding member of Lattice's ispLeverCORE Connection IP partners program.

The new program gives Lattice customers easy, reliable access to third-party IP products optimized for Lattice programmable logic devices (PLDs) that complement Lattice's internally developed and supported ispLeverCORE IP solutions. Information about several CAST processor, interface, and communications cores is already available through the ispLeverCORE website. Each core has undergone Lattice's acceptance process, and implementation results for different Lattice devices are available.

"Lattice is pleased to partner with CAST, an IP pioneer known for its dedication to supporting customers throughout the entire design process. We're very excited to add CAST products such as their 8051 and USB cores to the Lattice extended IP product line," said Stan Kopec, Lattice vice president of corporate marketing.

"Lattice's unique non-volatile and reconfigurable ispXPGA series, their popular and proven ORCA line, and their other diverse PLD products are a great match for the demanding applications typically built by CAST core customers," said Hal Barbour, president of CAST. "We're happy to work with a partner whose insistence on quality and customer value are consistent with our own, and we're already seeing interest in our ispLeverCORE Connection products."

Connection Cores from CAST
For the ispLeverCORE Connection program, CAST ports, optimizes, and tests their IP cores on several Lattice devices. After review and approval from Lattice, each core is then available in netlist format for purchase from CAST. The initial CAST Connection cores include:

• Bus Interface Cores
• • CUSB: USB 1.1 Device Controller Core
  • CUSB2: USB 2.0 Device Controller Core
  • SPI_MS: Serial Peripheral Interface Master/Slave Core
• Communication Cores
• • H16550S: UART with FIFOs and Synchronous CPU Interface Core
• Processor, Controller & Peripheral Cores
• • C8051: Legacy-Speed 8-Bit Processor Core
  • R8051: 8-bit RISC-like Microcontroller Core
  • SDLC: Controller Core

Customers can find complete specs and implementation data for these cores on the Lattice website, and should also check there for the latest additions to CAST's growing Connection Cores library (www.latticesemi.com/products/devtools/ip/cast/index.cfm).

About Lattice Semiconductor
Oregon-based Lattice Semiconductor Corporation designs, develops and markets the broadest range of Field Programmable Gate Arrays (FPGAs), Field Programmable System Chips (FPSCs) and high-performance ISP™ programmable logic devices (PLDs). Lattice offers total solutions for today's system designs by delivering the most 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 communication, computing, computer peripherals, instrumentation, industrial controls and military systems. Company headquarters are located at 5555 NE Moore Court, Hillsboro, Oregon 97124 USA; Telephone 503-268-8000, FAX 503-268-8037. For more information on Lattice Semiconductor Corporation, access our World Wide Web site at http://www.latticesemi.com.

About CAST, Inc.
CAST provides general purpose IP (gpIP), a broad range of popular and standards-based cores that includes processors, interfaces, and application-specific functions for multimedia and encryption. Designers use these cores so they can concentrate on the more unique, creative aspects of their system designs, or to quickly incorporate technology beyond their normal expertise.

Privately owned and operating since 1993 with a focus on making IP practical and affordable, the company has established a reputation for high-quality products, simple licensing, and responsive technical support. CAST is located near New York City, has a European operations center in the UK, and works with an international network of IP developers and distributors. Company headquarters are located at 11 Stonewall Court, Woodcliff Lake, NJ 07677 USA; Telephone 201-391-8300, FAX: 201-391-8694. For more information on CAST, Inc., please see http://www.cast-inc.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), in-system programmable, ISP, ispLeverCORE, ispXPGA, and ORCA 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.

For more information contact:

Sean Hildenbrand, Public Relations
Lattice Semiconductor Corporation
sean.hildenbrand@latticesemi.com
(503) 268-8680

Paul Lindemann
Montage Marketing for CAST, Inc.
paul@montmark.com
(603) 434-3534