EX-23.1 2011 10-K

We consent to the incorporation by reference in the registration statements on Form S-8 (No. 33-33933, No. 33-35259, No. 33-38521, No. 33-76358, No. 33-51232, No. 33-69496, No. 333-15737, No. 333-40031, No. 333-69467, No. 333-67274, No. 333-99247, No. 333-120959, No. 333-143387, and No. 333-176133) of Lattice Semiconductor Corporation of our reports dated March 12, 2012, with respect to the consolidated balance sheets of Lattice Semiconductor Corporation and subsidiaries as of December 31, 2011 and January 1, 2011, and the related consolidated statements of operations, changes in stockholders' equity and comprehensive income (loss), and cash flows for each of the years in the three-year period ended December 31, 2011, and the related consolidated financial statement schedule, and the effectiveness of internal control over financial reporting as of December 31, 2011, which reports appear in the December 31, 2011 annual report on Form 10-K of Lattice Semiconductor Corporation.