Lattice Semiconductor (LSCC) 10-Q 2003 Q3 Quarterly report

Exhibit 99.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Cyrus Y. Tsui, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Lattice Semiconductor Corporation on Form 10-Q for the quarterly period ended September 30, 2002 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such 10-Q fairly presents in all material respects the financial condition and results of operations of Lattice Semiconductor Corporation.

By:	/s/ Cyrus Y.Tsui
Name:	Cyrus Y. Tsui
Title:	Chief Executive Officer

I, Stephen A. Skaggs, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Lattice Semiconductor Corporation on Form 10-Q for the quarterly period ended September 30, 2002 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such 10-Q fairly presents in all material respects the financial condition and results of operations of Lattice Semiconductor Corporation.

By:	/s/ Stephen A. Skaggs
Name:	Stephen A. Skaggs
Title:	Chief Financial Officer