LATTICE SEMICONDUCTOR CORP — Director's Dealing 2012

May 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LATTICE SEMICONDUCTOR CORP (LSCC)
CIK: 0000855658
Period of Report: 2012-05-02

Reporting Person: CORESON DAVID E (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-02	Common Stock	M	15464	—	Acquired	15464	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-02	Restricted Stock Unit (RSU)	$	M	15464	Disposed		Common Stock (15464)	Direct

Footnotes

F1: Restricted Stock Units - no purchase price for this transaction.

F2: Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuers common shares without payment of specific consideration.

F3: The reporting person's service as a Director of the Company ceased effective May 2, 2012. Pursuant to the terms of the plan under which the restricted stock units were granted, all unvested units become fully vested and payable effective on the date of the end of his service.

F4: Not applicable.