* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.


                      ADVANCE PRODUCTION PAYMENT AGREEMENT


THIS ADVANCE PAYMENT AGREEMENT ("this Agreement"), is entered into this March
17, 1997, by and among SEIKO EPSON CORPORATION, a Japanese corporation  having
its principal place of business at 3-5, Owa 3-chome, Suwa-shi, Nagano-ken 392,
Japan ("Epson"), S MOS Systems Inc., a California corporation, having a place of
business at 150 River Oaks Parkway, San Jose, California 95134-1951, U.S.A.
("SMOS") and Lattice Semiconductor Corporation, a Delaware corporation, having a
place of business at 5555 N.E. Moore Ct., Hillsboro, Oregon 97124-6421, U.S.A.
("Lattice").


1  BACKGROUND

   1.1  EPSON
        Epson is in the business of designing, manufacturing, testing and
        selling semiconductor devices, among other products.  Epson
        manufactures such semiconductor devices at its plant located at 281
        Fujimi, Fujimi-machi, Suwa-gun, Nagano-ken 399-02, Japan (the "Fujimi
        Facility") and its plant located at 166-3 Jurizuka, Sakata-shi,
        Yamagata-ken 998-01, Japan (the "Sakata Facility").
        
   1.2  SMOS
        SMOS is an affiliate of Epson and is Epson's authorized distributor in
        the United States for semiconductor devices.  SMOS is in the business
        of designing, testing and selling semiconductor devices.  SMOS conducts
        its business at its office located at 150 River Oaks Parkway, San Jose,
        CA 95134-1951, U.S.A.

   1.3  LATTICE
        Lattice is in the business of designing, developing, manufacturing and 
        marketing and selling both high- and low-density E(2)-CMOS-Registered
        Trademark- programmable logic devices and related development system
        software.

                                       1


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.


  1.4  SCOPE OF AGREEMENT
       Epson and SMOS have an ongoing business relationship with Lattice
       whereby Epson fabricates semiconductor devices for Lattice.  The parties
       entered into an advance production payment agreement dated July 5, 1994
       for development and manufacture of 0.8-0.5 micron, 2-3 metal layer, 6
       inch CMOS semiconductor wafers.  The parties desire to expand their
       relationship.  Specifically, Lattice desires to develop and sell high
       performance, advanced architecture semiconductor devices, and Epson
       desires to construct ( * ) CMOS process line installed in the Site (as
       hereafter defined) in order to fabricate such semiconductor wafers and
       distribute them to Lattice through SMOS.  Accordingly, the parties agree
       that Lattice will pay to Epson an advance production payment ("APP")
       only to be used as a credit to purchase the Products from Epson through
       SMOS over a specified period of time in accordance with this Agreement. 
       The Products shall be first sold to SMOS from Epson, and then be sold to
       Lattice from SMOS under the terms and conditions of the Purchase
       Agreement (as hereafter defined).  (In the event that SMOS has fallen
       into a situation where it is unable to play the role required under this
       Agreement for any reason specifically prescribed in this Agreement or
       any other reason, Epson and Lattice will mutually consult about the
       substitute form of the transaction contemplated herein.)
       
  1.5  POSITION OF SMOS
       Notwithstanding any provision herein to the contrary, Lattice, Epson and
       SMOS acknowledges that although this Agreement is executed by each of
       such three (3) parties, SMOS is a party hereto solely for the purpose to
       evidencing its role, as the intermediary through which, under the terms
       of the Purchase Agreement, the Products to be sold to Lattice by Epson
       will be sold, and to evidence SMOS'S agreement to such an arrangement. 
       SMOS shall under no circumstances have any rights under this Agreement
       (it being understood, however, that this Article 1.5 shall not in any
       way affect the rights of SMOS under the Purchase Agreement).  In
       particular, and without limiting the generality of the foregoing, SMOS
       shall have no rights under Article 14 of this Agreement (i.e., any
       reference to party or parties to this Agreement shall be deemed to be
       only to Epson and Lattice unless 

                                       2


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

       specifically prescribed therein), and Epson and Lattice may amend this 
       Agreement in any respect.  Epson agrees to cause SMOS to comply with all 
       of the terms of this Agreement and the Purchase Agreement.  Any material 
       breach of the Purchase Agreement shall constitute a material breach to 
       this Agreement for the purpose of Article 14.4 of this Agreement.
       

2  DEFINITIONS

   2.1  "APP" will mean the advance production payment of Ten Billion Four
        Hundred and Sixty Nine Million and Seven Hundred Thousand Japanese Yen
        (JPY10,469,700,000) to be made by Lattice to Epson in the manner
        described in Article 4.  If the parties agree, in accordance with
        Article 4.4, on additional APP, the definition of "APP" hereof shall be
        interpreted to include such additional APP.

   2.2  "EQUIPMENT" will mean the semiconductor fabrication equipment that
        Epson will install in the New Facility for purposes of fabricating New
        Facility Wafers.

   2.3  "EXISTING AGREEMENTS" will mean those contracts for the development,
        fabrication, testing and/or sale of semiconductor devices between Epson
        and Lattice in effect as of the date of this Agreement.

   2.4  "FREE WAFERS" will have the meaning ascribed to it in Article 8.

   2.5  "FUJIMI FACILITY" will have the meaning ascribed to it in Article 1.1.

   2.6  "NEW FACILITY" will mean the ( * ) CMOS process line constructed at the
        Site using the Equipment.

   2.7  "NEW FACILITY WAFERS" will mean the semiconductor wafers to be
        fabricated by Epson for Lattice at the New Facility.

   2.8  "PRICE" will have the meaning ascribed to it in Article 10.1.

                                       3


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

             
   2.9  "PRODUCTS" will mean those specific types of New Facility Wafers
        fabricated using the same masks and the same process flow and
        identified by the same series or product name or number.  The Products
        will be ordered, fabricated, delivered and sold pursuant to the terms
        and conditions of Purchase Agreement(s).  The Products which the
        parties desire to fabricate at the New Facility will be agreed by and
        between Epson and Lattice, referring to the Process Road Map for
        Lattice attached hereto as Exhibit B, which may be reviewed and amended
        from time to time by mutual agreement of the parties.  The parties
        acknowledge however, that the final determination of what Products will
        be fabricated may depend on the results of joint development and
        product qualification.

   2.10 "PURCHASE AGREEMENT(S)" will mean the agreements by and between SMOS
        and Lattice pursuant to which SMOS agrees to sell and Lattice agrees to
        purchase the Products.  It is the intention of the parties to execute
        the Purchase Agreement, the terms of which shall be negotiated and
        agreed between SMOS and Lattice, after the execution of this Agreement.

   2.11 "PROJECTED COMPLETION SCHEDULE" will have the meaning ascribed to it in
        Article 3.1.2.

   2.12 "PURCHASE COMMITMENT" will have the meaning ascribed to it in Article
        7.1 and Exhibit D attached hereto.

   2.13 "SAKATA FACILITY" will have the meaning ascribed to it in Article 1.1.

   2.14 "SITE" will mean that portion of the Sakata Facility where the New
        Facility will be constructed.

   2.15 "SUPPLY COMMITMENT" will have the meaning ascribed to it in Article 6.1
        and Exhibit D.

   2.16 ( * ) Process will mean the ( * ), CMOS process owned, licensed or
        developed by Epson which will be used at the New Facility.  The ( * )
        Process will include (a) all process flow, process steps, process
        conditions, and modifications thereto, used to 

                                       4


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

        manufacture semiconductor wafers at the New Facility as well as (b) all 
        methods, formulae, procedures, technology and know-how associated with 
        such process steps and process conditions.  The ( * ) Process will not
        include any methods, formulae, procedures, technology or know-how
        licensed or received from Lattice under this Agreement, the Existing
        Agreements or other agreements executed between the parties in the
        future unless otherwise agreed in writing.  If the parties find it
        necessary or convenient to document process flow for any Product, such
        documentation will be signed by the parties and attached to the
        appropriate Purchase Agreement as an exhibit.

   2.17 "SUBSIDIARY" will mean any corporation, partnership, joint venture or
        other legal entity which agrees in writing to be bound by the terms and
        conditions of this Agreement and more than fifty percent (50%) of whose
        ownership rights are controlled directly or indirectly by Epson or
        Lattice, as the case may be, but only so long as such control exists.
        
3  CONSTRUCTION AND REPRESENTATION
            
   3.1  CONSTRUCTION OF THE NEW FACILITY
        
          3.1.1   LOCATION AND COSTS
            Epson hereby agrees, subject to its receipt of the full amount of
            the APP as provided in Article 4.1 to construct the New Facility at
            the Site and to install the Equipment therein.

          3.1.2   COMPLETION SCHEDULE
            The projected completion schedule for the construction of the New
            Facility (the "Projected Completion Schedule") is set forth in
            Exhibit A attached hereto.  In the event Epson has reason to
            believe that any item in the Projected Completion Schedule
            designated as a "Construction Milestone" will be delayed by more
            than thirty (30) calendar days, Epson will promptly notify Lattice
            in writing and (a) explain the reason for the delay, (b) describe
            the estimated amount of time that construction will be delayed and
            (c) 

                                       5


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

            describe the action that Epson will take to minimize the delay.

          3.1.3   BUSINESS INTERRUPTION INSURANCE
            Epson will use its best efforts to obtain business interruption
            insurance coverage for the New Facility once the construction of
            the New Facility is complete.  The insurance will cover at least
            such risks as are usually insured against by companies engaged in
            the manufacture of semiconductor devices in Japan.  Epson will
            maintain such business interruption insurance coverage during the
            term of this Agreement.  Epson will furnish to Lattice, upon
            written request, full information concerning the business
            interruption insurance coverage.

          3.1.4   FIRST SHIPMENT DELAY
            In the event that the first mass production of the first Product is
            expected to be delayed beyond the process road map described in the
            latest version of Exhibit B, firstly, the shipment of such Product
            shall be made by utilizing existing facilities in the Sakata
            Facility subject to successful completion of the relevant process
            at such existing facility.  Such alternative shipment shall not be
            applied for off-setting the APP.  Epson shall provide regular
            action plans for the cure of the delay, and make monthly progress
            reports to Lattice.  If no cure is achievable by the beginning of 
            ( * ), and if the delay is not caused by Lattice, then Epson shall,
            in addition to the Free Wafers as prescribed in Article 8 hereof,
            provide additional free wafers ( * ).

          3.1.5   DESIGN REQUIREMENTS
            Epson acknowledges that Lattice may require certain safety and
            security requirements for semiconductor fabrication facilities, and
            Epson agrees to work with Lattice to incorporate such requirements
            into the design of the New Facility to the extent reasonably
            requested by Lattice and commercially feasible.

                                       6


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

            

   3.2  REPRESENTATIONS OF EPSON
        In order to induce Lattice to enter into this Agreement and to make the
        APP hereunder, Epson hereby represents and warrants that:
       
         3.2.1    CORPORATE STATUS
           Epson (a) is duly organized, validly existing and in good standing
           under the laws of the jurisdiction of its incorporation, (b) has the
           corporate power to own or lease its assets and to transact the
           business in which it is currently engaged and (c) is in compliance
           with all requirements of law except to the extent that the failure
           to comply therewith will not materially affect the ability of Epson
           to perform its obligations under this Agreement.
           
         3.2.2    CORPORATE AUTHORITY
           (a) Epson has the corporate power, authority and legal right to
           execute, deliver and perform this Agreement and has taken as of the
           date hereof all necessary corporate action to execute this
           Agreement, (b) the person executing this Agreement has actual
           authority to do so on behalf of Epson and (c) there are no
           outstanding assignments, grants, licenses, encumbrances, obligations
           or agreements, either written, oral or implied, that prohibit
           execution of this Agreement.
           
         3.2.3    OWNERSHIP OF THE SITE
           Epson has such right, title and interest in and to the Site and the
           structures located thereon as is required to permit the operation of
           the Site as currently conducted and contemplated to be conducted
           under this Agreement.
           
         3.2.4    NO MATERIAL LITIGATION
           No litigation, investigation or administrative proceeding is
           presently pending, or to the knowledge of Epson, threatened against
           Epson which, if adversely determined, would materially affect
           Epson's ability to carry out the terms and conditions of this
           Agreement.  If such material litigation, investigation or
           administrative proceeding is commenced against Epson, Epson shall
           notify Lattice thereof within 

                                       7


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

           thirty (30) days of the commencement.
           
   3.3  REPRESENTATION OF SMOS
        In order to induce Lattice to enter into this Agreement and to make the
        APP hereunder, SMOS hereby represents and warrants that: 
       
         3.3.1    CORPORATE STATUS
           SMOS (a) is duly organized, validly existing and in good standing
           under the laws of the jurisdiction of its incorporation, (b) has the
           corporate power to own or lease its assets and to transact the
           business in which it is currently engaged and (c) is in compliance
           with all requirements of law except to the extent that the failure
           to comply therewith will not materially affect the ability of SMOS
           to perform its obligations under this Agreement.
           
         3.3.2    CORPORATE AUTHORITY
           (a) SMOS has the corporate power, authority and legal right to
           execute, deliver and perform this Agreement and has taken as of the
           date hereof all necessary corporate action to execute this
           Agreement, (b) the person executing this Agreement has actual
           authority to do so on behalf of SMOS and (c) there are no
           outstanding assignments, grants, licenses, encumbrances, obligations
           or agreements, either written, oral or implied, that prohibit
           execution of this Agreement.
           
         3.3.3    NO MATERIAL LITIGATION
           No litigation, investigation or administrative proceeding is
           presently pending, or to the knowledge of SMOS, threatened against
           SMOS which, if adversely determined, would materially affect SMOS's
           ability to carry out the terms and conditions of this Agreement.  If
           such material litigation, investigation or administrative proceeding
           is commenced against SMOS, SMOS shall notify Lattice thereof within
           thirty (30) days of the commencement.
           
   3.4  REPRESENTATIONS OF LATTICE
        In order to induce Epson to enter into this Agreement and to make the
        Supply Commitment, Lattice hereby represents and warrants 

                                       8


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

        that:
       
         3.4.1    CORPORATE STATUS
           Lattice is duly organized, validly existing and in good standing
           under the laws of the jurisdiction of its incorporation, (b) has the
           corporate power to own or lease its assets and to transact the
           business in which it is currently engaged and (c) is in compliance
           with all requirements of law except to the extent that the failure
           to comply therewith will not materially affect the ability of
           Lattice to perform its obligations under this Agreement.
           
         3.4.2    CORPORATE AUTHORITY
           (a) Lattice has the corporate power, authority and legal right to
           execute, deliver and perform this Agreement and has taken as of the
           date hereof all necessary corporate action to execute this
           Agreement, (b) the person executing this Agreement has actual
           authority to do so on behalf of Lattice and (c) there are no
           outstanding assignments, grants, licenses, encumbrances, obligations
           or agreements, either written, oral or implied, that prohibit
           execution of this Agreement. 
           
         3.4.3    NO MATERIAL LITIGATION
           No litigation, investigation or administrative proceeding is
           presently pending, or to the knowledge of Lattice, threatened
           against Lattice which, if adversely determined, would materially
           affect Lattice's ability to carry out the terms and conditions of
           this Agreement.  If such material litigation, investigation or
           administrative proceeding is commenced against Lattice, Lattice
           shall notify Epson thereof within thirty (30) days of the
           commencement.
           
4  APP
       
   4.1  APP
        Lattice shall pay to Epson an amount equal to Ten Billion, Four Hundred
        sixty nine Million and Seven Hundred Thousand Japanese Yen
        (JPY10,469,700,000) ("APP"), which APP will be credited against certain
        future purchases by Lattice of New Facility 

                                       9


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

        Wafers as provided in Article 5.  Lattice will pay the whole amount of 
        APP in accordance with the payment schedule described in Exhibit C 
        hereof.

   4.2  PAYMENT METHOD
        All payments made by Lattice to Epson will be in immediately available
        funds and will be made by wire transfer in Japanese Yen to the following
        bank account of Epson at:
       
        ( * )
        ( * )
        For the Account of Seiko Epson Corporation.
       
   4.3  NON-REFUND OF APP
        The APP will not be refundable except as provided in Articles 6.4.1 or
        14.8.

   4.4  ADDITIONAL APP
        Epson acknowledges that Lattice may wish to pay to Epson additional APP
        of Sixty Million U.S. Dollars (US$60,000,000), to be converted to, and
        paid in Japanese Yen using U.S. dollar/Japanese Yen exchange rate
        prevailing in Tokyo, as published in Nihon Keizai Shinbun (Nikkei
        Newspaper), as at the end of a month immediately preceding the month
        during which the parties execute an amendment to this Agreement to
        effectuate such additional APP.  Lattice will notify Epson by ( * ),
        whether or not it wishes to pay such additional APP.  If Lattice so
        wishes to pay to Epson additional APP, Lattice's additional APP shall be
        deemed to be a part of the APP for all purposes hereunder, including but
        not limited to the same Price, procedure to offset from the additional
        APP, and Free Wafers.  The specific terms for such additional APP,
        including payment terms, term of this Agreement and the additional
        Supply/Purchase Commitment shall be determined and added as an addendum
        to this Agreement within ninety (90) days of Lattice's first
        notification stated above.
       
5  CREDIT OF APP
       
   5.1  CREDIT OF APP
        The Purchase price of all New Facility Wafers purchased by 

                                       10


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

        Lattice under the Purchase Agreement will be credited against the amount
        of the APP until the aggregate Japanese Yen value of all New Facility 
        Wafers (excluding the Free Wafers) purchased and received by Lattice, 
        calculated pursuant to Article 5.2, equals or exceeds the amount of the 
        APP.  The criteria and time required for wafer acceptance by Lattice 
        will be described in the Purchase Agreement.
            
   5.2  CALCULATION OF AGGREGATE CREDIT VALUE
        The amount of APP will be offset and reduced on Japanese Yen to Japanese
        Yen basis, at the end of each calendar month of this Agreement, by an 
        amount equal to the Price for the New Facility Wafers multiplied by the 
        total number of New Facility Wafers (excluding the Free Wafers) shipped 
        to Lattice pursuant to the Purchase Agreement during the calendar month,
        with adjustment of the increase pursuant to the methods provided in the 
        Purchase Agreement, however under no circumstances shall the APP balance
        be increased, except as provided for in Article 14.8 of this Agreement. 
        Further, any wafer provided to Lattice under Article 6.4.1 from 
        alternative facility, besides the New Facility, shall not be used to 
        offset the APP.
            
   5.3  INVOICES
        Epson will cause SMOS to provide Lattice with invoices under the 
        Purchase Agreement which, for the purpose of APP application, specify 
        the purchase price of the New Facility Wafers.  Also, SMOS shall provide
        Lattice and Epson with the monthly report describing, among others, the 
        outstanding balance of the APP (after the application of all prior 
        offsets, reductions and credits) as of the commencement of the month 
        subject to the invoices, the number of New Facility Wafers shipped to 
        Lattice during that calendar month and the applied Price, and the 
        outstanding balance of the APP as of the end of such calendar month.  
        Such report shall be signed by the respective responsible person at 
        Epson, SMOS and Lattice, provided that Lattice shall not be required to 
        sign any such report unless it is satisfied with the accuracy and 
        completeness thereof. Lattice may, for its signature, review all 
        invoices and reports for inaccuracies and if any such inaccuracies are 
        found and confirmed by Epson and 

                                       11


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

        SMOS, Lattice may request to make corrections to these invoices and 
        reports.

   5.4  OBLIGATION AFTER COMPLETION OF OFF-SETTING THE APP
        Lattice will be required to pay for all New Facility Wafers in 
        accordance with the Purchase Agreements once the Advance Payment has 
        been fully offset and reduced.  Lattice will make the payments to Epson 
        in Japanese Yen based on the Price.  Further, Epson will be required to 
        fulfill the Supply Commitment and Lattice will be required to fulfill 
        the Purchase Commitment until Lattice has purchased ( * ) New Facility 
        Wafers.  After Lattice has purchased this fixed volume of the New 
        Facility Wafers, during the effective period of this Agreement, Epson 
        and Lattice will continue to make efforts to supply and purchase at the 
        rate to be mutually agreed under fair and competitive prices to be 
        determined between the parties.

6  SUPPLY COMMITMENT
       
   6.1  CONTENTS OF SUPPLY COMMITMENT
        It is the intent of Lattice to purchase and Epson to supply New Facility
        Wafers until a total ( * ) New Facility Wafers have been supplied to 
        Lattice by Epson through SMOS and received and accepted by Lattice 
        ("Supply Commitment").  The Supply Commitment and the supply schedule 
        thereof are set forth in Exhibit D.  The Supply Commitment herein shall 
        remain in effect until Lattice has received and accepted a total of 
        ( * ) New Facility Wafers (exclusive of the Free Wafers) through SMOS 
        from Epson under this Agreement.  Dealing of New Facility Wafers 
        rejected by Lattice for any reason shall be as described in the Purchase
        Agreement. The Supply Commitment for a particular month may be modified 
        as specifically set forth in this Agreement, but under no circumstances 
        shall the aggregate Supply Commitment of ( * ) New Facility Wafers be 
        reduced.
            
   6.2  PURCHASE AGREEMENTS
        The Supply Commitment will apply to Products covered by the Purchase 
        Agreements.  The parties anticipate that such Purchase Agreements will 
        apply to Products distributed by Lattice which require fabrication using
        the ( * ) Process.

                                       12


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  treatment request.

   6.3  EXCESS CAPACITY
        Epson will use its best efforts to provide Lattice, through SMOS, with 
        excess capacity of the New Facility if Lattice requires so in the manner
        specified below.  In this case, APP shall be applied to Lattice's orders
        of New Facility Wafers in excess of the Supply Commitment of the month. 
        Also, the Free Wafers prescribed in Article 8 shall be provided for such
        excess volume of the New Facility Wafers.  First, in the event that 
        Lattice desires to purchase New Facility Wafers in excess of the 
        Purchase Commitment, Lattice will specify in writing the amount of 
        capacity required, the Product(s) it desires to purchase and the date 
        from which such capacity is required, and notify Epson of it through 
        SMOS.
            
        Second, Epson will then determine how much capacity is available and 
        notify Lattice of its determination through SMOS.  Epson will give 
        Lattice priority over third parties for excess capacity of the New 
        Facility except to the extent that Epson is already obligated to provide
        such third parties with capacity.
            
        Third, the parties will then mutually agree upon a preliminary excess 
        capacity allocation.  Any excess capacity allocated under this Article 
        6.3 will be applied to the Supply Commitment and to the Purchase 
        Commitment.
            
        In order to provide Lattice with first priority for unused capacity 
        using the specific process for Lattice, Epson agrees to give Lattice 
        monthly written notice of any unused capacity using the specific process
        for Lattice for the next ( * ), and to provide Lattice with the first 
        right to reserve such unused capacity for any New Facility Wafers which 
        Lattice desires to purchase in excess of the Purchase Commitment.  
        Lattice will have a reasonable time to elect to reserve such excess 
        capacity.  The parties acknowledge that "specific process for Lattice" 
        above refers to Lattice's ( * ) process, and that Epson's capacity plan 
        at the time of executing this Agreement shows that approximately ( * ) 
        of total production capacity of the New Facility will be for ( * ) 
        process, subject to change by then-current production plan of Epson.  
        Epson will notify Lattice if the capacity set aside for ( * ) process 
        will change by ( * ) of the total 

                                       13


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  treatment request.

        capacity. 
            
   6.4  FAILURE TO MEET SUPPLY COMMITMENT
     
         6.4.1    FAILURE DUE TO EPSON
           In the event that (a) Epson fails to fulfill the Supply Commitment
           by the end of any month during the term of this Agreement or (b)
           Epson has reason to believe that it will be unable to fabricate the
           Supply Commitment by the end of such month, then Epson will take the
           following measures:
           
           First, Epson will promptly notify Lattice in writing and describe
           the nature of the difficulty.
           
           Second, Epson will use its best efforts to remedy the difficulty in
           an expeditious manner by the end of the second full month following
           the month in which Epson is unable to meet the Supply Commitment (in
           other words, the third month including the month in which the
           difficulty occurs).
           
           Third, Epson will use its best efforts to make available during the
           above referenced three (3) month period sufficient capacity at the
           Sakata Facility, the Fujimi Facility or Epson's other qualified
           facility to cover the deficiency between the Supply Commitment and
           the actual capacity subject to completion of product qualification. 
           The parties acknowledge, however, that Epson cannot guarantee the
           use of such alternative capacity.
           
           Fourth, if Epson's inability to fulfill the Supply Commitment is due
           to force majeure prescribed in Article 15.14, Epson will use its
           best efforts to make available alternative capacity at the Sakata
           Facility and/or Fujimi Facility.  The parties acknowledge, however,
           that Epson cannot guarantee the use of existing capacity at the
           Sakata Facility or Fujimi Facility. 
          
           Notwithstanding any provision of this Agreement to the contrary, in
           the event that Epson fails to fulfill the Supply Commitment
           (including any failure by virture of the 

                                       14


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  treatment request.

           action or inaction of SMOS or any of the deficiency within the three 
           (3) month period referenced above), such failure shall constitute a 
           material breach of this Agreement and Epson, SMOS and Lattice shall 
           discuss the relief of such breach prior to Lattice's termination of 
           this Agreement based on the right permitted in Article 14.4 (which
           termination may be made without the notice and cure period 
           contemplated by Article 14.4).
           
         6.4.2    FAILURE DUE TO LATTICE
           Notwithstanding anything contained in Article 6.4.1 to the contrary,
           in the event that Epson fails to fulfill the Supply Commitment in
           any month due to (a) design defects in Products caused by Lattice,
           (b) design changes requested by Lattice, (c) process flow changes
           requested by Lattice or (d) any other reason caused by Lattice,
           Epson will only be required to make reasonable efforts to fulfill
           the Supply Commitment in such month.  Provisions concerning
           Lattice's failure to fulfill its Purchase Commitment are set forth
           in Article 7.2.
           
         6.4.3    FAILURE DUE TO BOTH PARTIES
           Notwithstanding anything contained in Article 6.4.1, 6.4.2 or 7.1 to
           the contrary, in the event that Epson fails to fulfill the Supply
           Commitment and Lattice fails to fulfill the Purchase Commitment due
           to difficulties caused jointly by Lattice and Epson, the parties
           will mutually agree in writing upon a fair and equitable solution.
           
         6.4.4    FAILURE DUE TO CATASTROPHE
           In the event that any fire, flood, earthquake, explosion or any
           other catastrophe prevents Epson from fabricating New Facility
           Wafers for Lattice, (a) Epson will immediately implement the
           measures required by Article 6.4.1, (b) Epson

                                       15


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  treatment request.

           will permit Lattice to inspect the New Facility, and (c) the parties 
           will begin good faith negotiations to agree on a corrective action 
           plan.
           
           
7  PURCHASE COMMITMENT
       
   7.1  CONTENT OF PURCHASE COMMITMENT 
        Lattice intends to purchase each month the number of New Facility Wafers
        (the "Purchase Commitment") equal to the Supply Commitment until ( * )
        wafers have been purchased. Lattice will not be required to fulfill the
        Purchase Commitment in the event that Epson fails to fulfill the Supply
        Commitment in the manner specified in Article 6.4.1.  Instead, subject
        to the terms of the Purchase Agreement, Lattice will be required to
        purchase those New Facility Wafers that Epson is able to fabricate up to
        the Purchase Commitment for each month. Lattice will not be required to
        fulfill the Purchase Commitment in the event of difficulties caused by
        both Epson and Lattice.  Instead, the parties will mutually agree in
        writing upon a fair and equitable solution.
       
   7.2  SALE OF UNUSED CAPACITY
        In the event that Lattice is unable to fulfill the Purchase Commitment
        in any month for reasons not due to Epson, Epson will use its best
        efforts to sell unused capacity to other customers, or to allocate
        unused capacity for the fabrication of Epson products during such month.
        Further, the Supply Commitment for such month will be reduced to the
        same extent that Lattice is unable to fulfill the Purchase Commitment. 
        When Lattice desires to increase its monthly purchases after Epson has
        sold or otherwise allocated unused capacity, then Epson will use its
        best efforts to increase capacity for Lattice to the Supply Commitment
        in an expeditious manner.  The parties will mutually agree upon the
        specific rate at which Epson will be required to ramp up capacity to the
        Supply Commitment.
       

                                       16


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  treatment request.

8  FREE WAFERS
  
   As a consideration for Lattice's payment of APP, Epson shall provide Lattice
   with ( * ) free wafers of a Product ("Free Wafers") through SMOS pursuant to
   the Purchase Agreement for every ( * ) New Facility Wafers ordered by Lattice
   after the execution of this Agreement ( * ) until Epson has supplied ( * )
   New Facility Wafers (excluding the Free Wafers). 
  
9  FABRICATION, PURCHASE AND SALE

   9.1  GENERAL TERMS AND CONDITIONS
        The terms and conditions for the prototype wafer fabrication, wafer
        fabrication, order and acceptance, shipping, insurance and warranty for
        the Products will be set forth in the Purchase Agreements. The parties
        have agreed to certain order and forecast systems as described in
        Exhibit F, which will be incorporated in the Purchase Agreement. The
        parties acknowledge that a best estimation and target of defect
        densities as at the date of this Agreement is set forth in Exhibit H
        attached hereto, which will be reviewed and amended from time to time by
        the parties hereto, and will be incorporated into all Purchase
        Agreements.
       
   9.2  START OF PRODUCTION
        Qualification testing for the Products will be conducted in the manner
        specified in the Purchase Agreement.  Once any Product has been
        qualified, Epson will begin mass production of such Product in the
        manner specified by the Purchase Agreement.
       
   9.3  TURN AROUND TIME
        The parties acknowledge that the lead time for shipment of New Facility
        Wafers, defined as the time from Lattice's purchase order release until
        delivery of New Facility Wafers, known as "turn around time", is of the
        essence, and agree that the parties shall set annual target turn around
        time and make their joint efforts to achieve such target in accordance
        with Exhibit I.

10 WAFER PRICING AND PAYMENT

                                       17


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  treatment request.

       
   10.1 DETERMINATION OF PRICE
        The general method for determining the price of Products ("Price") shall
        be as set forth in Exhibit E.  Epson agrees that at any time the Prices
        to Lattice ( * ).  The Price herein shall be applicable until Lattice
        has completed the purchase of ( * ) New Facility Wafers under the terms
        of this Agreement.
       
   10.2 SHIPPING, INSURANCE, TAXES, DUTIES AND OTHER FEES
        Epson will deliver the Products on a C.I.F., San Jose basis, and SMOS
        will deliver such Products to Lattice on an F.O.B., San Jose basis. 
        Bearing of sales, use, excise, ad valorem, withholding or other taxes or
        duties that may be applicable to purchase of the Products by Lattice
        shall be prescribed in the Purchase Agreement.

   10.3 PAYMENT
        Other than through offset of the APP, Lattice will not be required to
        pay for any New Facility Wafers delivered under this Agreement or any
        Purchase Agreement until the APP has been fully offset and reduced. 
        Once the APP is fully offset and reduced, Lattice will be required to
        pay Epson in the manner specified in the Purchase Agreement based on the
        Price until Lattice has completed the purchase of ( * ) New Facility
        Wafers under the terms of this Agreement.
       

11 TECHNICAL COOPERATION AND SUPPORT
  
   The parties desire to engage in various types of joint development and
   technical cooperation activities required to fabricate Products and to
   effectuate the terms and conditions of this Agreement.  The parties,
   including SMOS, will discuss such joint development possibilities, and will
   conclude appropriate agreement(s).

12 INTELLECTUAL PROPERTY RIGHTS
  
   All intellectual property rights clauses relating to ( * ) Process and the
   Products will be set forth in the Purchase Agreement.  Lattice agrees that
   any indemnity or warranty that Lattice expressly provides to Epson or SMOS
   under the Purchase Agreement will be fully 

                                       18



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  treatment request.

   enforceable by Epson even though Epson has not executed the Purchase 
   Agreement.  Furthermore, Epson agrees that any indemnity or warranty that 
   Epson or SMOS purports to provide to Lattice under the Purchase Agreement 
   will be fully enforceable by Lattice even though Epson has not executed the 
   Purchase Agreement.  In the event that any claims for intellectual property 
   rights infringements described in the Purchase Agreement prevent the parties 
   from fulfilling the Supply Commitment and the Purchase Commitment, the 
   parties will mutually agree on a fair and equitable solution without 
   affecting in any way the right of either party to terminate this Agreement 
   for cause pursuant to Article 14.4 as a consequence of failure of the other 
   party to fulfill this Agreement and the Purchase Agreement as the case may 
   be.  The parties acknowledge that the covenants contained in this Article 12 
   are an essential part of this Agreement. 

13 CONFIDENTIAL INFORMATION
       
   13.1 DEFINITIONS
        "Confidential Information" means technical information, specifications,
        data, drawings, designs or know-how, prices, order volumes, forecasts,
        financial information, strategic plans, and other important business
        information disclosed between Epson and Lattice, or SMOS and Lattice in
        connection with this Agreement.  Confidential Information includes
        information or material that is expressly covered by confidentiality
        provisions of Existing Agreements or the Purchase Agreement, it being
        understood that such provisions will apply.

   13.2 MARKING
        If Confidential Information is provided in a tangible form, it will be
        marked as confidential or proprietary.  If Confidential Information is
        provided orally, it will be treated as confidential and proprietary if
        it is treated as confidential or proprietary at the time of disclosure
        by the disclosing party and described as such in a writing provided to
        the other party within thirty (30) days of the oral disclosure, which
        writing will be marked as confidential or proprietary.  Material that is
        not marked as required by this Article 13.2 will not be deemed
        Confidential Information.

                                       19


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  treatment request.

       
   13.3 RESTRICTIONS ON USE
        During the term of this Agreement and for a period of ( * ) years
        following disclosure of any Confidential Information, the receiving
        party will: (a) hold the Confidential Information in confidence using
        the same degree of care that it normally exercises to protect its own
        proprietary information but no less than a reasonable degree of care,
        (b) restrict disclosure and use of Confidential Information solely to
        those employees (including any contract employees or consultants) of
        such party on a need-to-know basis, and not disclose it to other
        employees or parties, and (c) restrict the number of copies of
        Confidential Information to the number required to carry out its
        obligations under this Agreement.
       
   13.4 EXCEPTIONS TO CONFIDENTIALITY OBLIGATIONS
        Neither party will use or disclose the other party's Confidential
        Information except as permitted by this Agreement.  The receiving party,
        however, will have no obligations concerning the disclosing party's
        Confidential Information if the disclosing party's Confidential
        Information:
            a)    is made public before the disclosing party discloses it to
                  the receiving party;
            b)    is made public after the disclosing party discloses it to the
                  receiving party (unless its publication is a breach of this
                  Agreement or any other agreement between Epson and Lattice);
            c)    is rightfully in the possession of the receiving party before
                  the disclosing party discloses it to the receiving party;
            d)    is independently developed by the receiving party without the
                  use of the Confidential Information, if such independent
                  development is supported by documentary evidence; or
            e)    is rightfully obtained by the receiving party from a third
                  party who is lawfully in possession of the information and not
                  in violation of any contractual, legal or fiduciary obligation
                  to the disclosing party with respect to the information.

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  treatment request.

            
                  Each party may disclose any Confidential Information to the
                  extent that such party has been advised by counsel that such
                  disclosure is necessary to comply with laws or regulations
                  provided that such party shall give the other party reasonable
                  advance notice of such proposed disclosure, shall use its best
                  efforts to secure confidential treatment of such Confidential
                  Information, and shall advise the other party in writing of 
                  the manner of the disclosure.
               
   13.5 RETURN OF CONFIDENTIAL INFORMATION
        Upon termination of this Agreement, a party who has received
        Confidential Information from the other party pursuant to this Agreement
        will return, within fourteen (14) days of the disclosing party's request
        for return, all Confidential Information that was obtained or learned by
        the receiving party from the disclosing party, or delivered to the
        receiving party, together with all copies, excerpts and translations
        thereof.
       
14 TERM AND TERMINATION OF AGREEMENT
       
   14.1 TERM
        The term of this Agreement will extend from the date first written above
        until the latest of (a) Epson's completion of the supply of, and receipt
        and acceptance by Lattice of, ( * ) New Facility Wafers in total ( * ),
        (b) the completion of off-setting APP, or (c) ( * ), unless terminated
        earlier pursuant to Article 14.2, 14.3 or 14.4.  After the expiration of
        this Agreement, Epson and Lattice shall continue to make efforts to
        supply and purchase a certain volume of wafers per month under fair and
        competitive prices to be determined between the parties.
       
   14.2 TERMINATION
        Either party may terminate or suspend this Agreement immediately and
        without liability (except for the terms provided in Articles 14.5 and
        14.6) upon written notice to the other party if any one of the following
        events occurs;:
       
            a)    the other party files a voluntary petition in bankruptcy or
                  otherwise seeks protection under any law for the 

                                       21


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  treatment request.

                  protection of debtors;
               
            b)    a proceeding is instituted against the other party under any
                  provision of any bankruptcy laws which is not dismissed within
                  ninety (90) days;
               
            c)    the other party is adjudged bankrupt;
               
            d)    a court assumes jurisdiction of all or a substantial portion
                  of the assets of the other party under a reorganization law;
               
            e)    a trustee or receiver is appointed by a court for all or a
                  substantial portion of the assets of the other party;
               
            f)    the other party becomes insolvent, ceases or suspends all or
                  substantially all of its business;
               
            g)    the other party makes an assignment of the majority of its
                  assets for the benefit of creditors; or
               
            h)    the other party fails to pay all or a substantial portion of
                  its debts as they become due or admits in writing its 
                  inability to pay all or a substantial portion of its debts as 
                  they become due; or 
            
            i)    force majeure, as prescribed in Article 15.14, becomes in
                  effect and performance of the obligations under this Agreement
                  will not be restored within six (6) months after such force
                  majeure's occurrence.
               
   14.3 TERMINATION DUE TO ACQUISITION OR SALE OF ASSETS
        In the event that a direct competitor or one party acquires, through
        merger, consolidation, acquisition or otherwise, an interest in excess
        of fifty percent (50%) of the voting securities or assets of the other
        party, or such other party transfers all or substantially all of its
        business to which this Agreement relates to a direct competitor of such
        party, the non-aquiring or non-transferring party will be permitted,
        upon written notice to the other party, to require that the 

                                       22


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  treatment request.

        transactions contemplated by this Agreement and the Purchase Agreements 
        be phased out and terminated at a rate not to exceed, ( * ) of the 
        business existing at the time of the acquistion or transfer according to
        the following schedule:

            A                 B
            -                 -

            ( * )             ( * )
            ( * )             ( * )
            ( * )             ( * )
            ( * )             ( * )

        A-   Time elapsed since acquisition or transfer of assets
        B-   Level to which business may be phased out measured as a percentage
             of business existing at the time of the acquisition or transfer of
             assets
       
        Alternatively, the business may be phased out and terminated under this
        Article 14.3 in a manner otherwise agreed upon in writing by the
        parties.

   14.4 TERMINATION FOR CAUSE
        If either party fails to perform or violates any material obligation of
        this Agreement, then, sixty (60) days after providing written notice to
        the breaching party specifying the default (the "Default Notice"), the
        non-breaching party may terminate this Agreement, without liability,
        unless:
       
            a)    the breach specified in the Default Notice has been cured
                  within the sixty (60) day period; or
               
            b)    the default reasonably required more than sixty (60) days to
                  correct, and the defaulting party has begun substantial
                  corrective action to remedy the default within such sixty (60)
                  day period and diligently pursues such action, in which event,
                  the non-breaching party may not terminate or suspend this
                  Agreement unless one hundred twenty (120) days has expired 
                  from the date of the Default Notice without such corrective 
                  action being 

                                       23


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  treatment request.

                  completed and the default remedied.
               
   14.5 TERMINATION BY EPSON
        In the event that Epson terminates this Agreement pursuant to this
        Article 14, then, unless otherwise agreed upon in writing, Epson may
        offset and reduce the APP to cover all direct material and labor costs
        for work in process rendered unusable by termination and will ship such
        work in process to Lattice, at Lattice's expense, if requested to do so.
        Upon such termination, Epson shall refund the remaining portion of APP
        (reduced by the amount of any such offset and reduction to cover direct
        material and labor costs for work in process rendered unusable by the
        termination) no later than thirty (30) business days after the date of
        termination.

   14.6 TERMINATION BY LATTICE
        In the event that Lattice terminates this Agreement pursuant to this
        Article 14, then, unless otherwise agreed in writing, Lattice may either
        (a) request that Epson refund the remaining portion of APP (from which
        Epson may offset and reduce to cover all direct material and labor costs
        for work in process rendered unusable by the termination) and then Epson
        will refund the remaining portion of APP (as so offset and reduced) or
        (b) request Epson to complete all work in process and ship them under
        normal terms and conditions, and then Epson will refund the remaining
        portion of APP (excluding, without limitation, the costs and expenses
        which have arisen in connection with completing all work in process and
        shipping thereof), with in either such case such refund to be paid upon
        the earlier of:

        (a)  receipt of sufficient funding from a financial institition or other
        source for purposes of paying the refund, or
        (b)  thirty (30) days from the date of termination.

                                       24



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  treatment request.


   14.7 RETENTION OF RIGHTS AFTER TERMINATION
        Notwithstanding anything contained in this Article 14 to the contrary,
        in the event that either party is entitled to terminate this Agreement
        pursuant to Articles 14.2 (f), (g) or (h) or either party is subject to
        a bankruptcy, reorganization or liquidation proceeding, the other party
        may elect to (a) retain its rights in this Agreement existing
        immediately prior to termination pursuant to Article 14.2 (f), (g) or
        (h) or the initiation of such proceeding or (b) treat any such
        proceeding or attempted rejection of this Agreement by a bankruptcy
        trustee as an event of termination.  Unless otherwise provided, in the
        event of such termination, Epson shall refund the remaining portion of
        the APP in accordance with article 14.5 or 14.6 as applicable.

   14.8 RECONCILIATION
        In the event of termination that results in a refund of the APP balance
        pursuant to Article 14 (or would result in such a refund if the APP
        balance were increased by the net return material account balances, if
        any, under the Purchase Agreement), Epson shall cause SMOS to bring
        current the APP, Free Wafers and return material account balances as
        provided for in the Purchase Agreement in order to reconcile the account
        with Lattice, and to refund the mutually agreed net amount.

   14.9 SURVIVAL OF OBLIGATIONS
        The following Articles will survive any expiration, termination or
        cancellation of this Agreement and the parties will continue to be bound
        by the terms and conditions thereof: 12, 13, 14, and 15.
       
15 MISCELLANEOUS
       
   15.1 ORDER OF PRECEDENCE
        In the event of any conflicts between this Agreement and any Purchase
        Agreement, any purchase orders, acceptances, correspondence, memoranda,
        listing sheets or other documents forming part of an order for the
        Products placed by Lattice and accepted by SMOS (or Epson), priority
        will be given first to this Agreement, second to the Purchase
        Agreements, third to SMOS's or 

                                       25



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  treatment request.

        Epson's acceptance, fourth to Lattice's order and then to any other 
        documents.  In no event, however, will either party's standard terms and
        conditions be applicable to the transactions between the Lattice and 
        SMOS (or Epson), unless expressly accepted in writing by the other 
        party.
       
   15.2 GOVERNING LAW
        This Agreement shall be governed by and construed in accordance with the
        laws of California, U.S.A. without reference to conflict of law
        principles.

   15.3 DISPUTE RESOLUTION
       
        15.3.1    MEETING OF EXECUTIVES
           In the event that any dispute or disagreement between the parties as
           to any provision of this Agreement arises, prior to taking any other
           action, the matter will be referred to responsible executives of the
           parties for consideration and resolution.  Any party may commence
           such proceedings by delivering a written request to the other party
           for a meeting of such responsible executives.  The other party will
           be required to set a date for the meeting to be held within thirty
           (30) days after receipt of such request and the parties agree to
           exercise their best efforts to settle the matter amicably.
           
        15.3.2    LOCATION OF MEETING
           In the event that Epson initiates the proceedings described in
           Article 15.3.1, the first meeting will be held Hillsboro, Oregon and
           all subsequent meetings will alternate between Tokyo, Japan, and
           Hillsboro, Oregon.  In the event that Lattice initiates the
           proceedings described in Article 15.3.1, the first meeting will be
           held in Tokyo, Japan and all subsequent meetings will alternate
           between Hillsboro, Oregon and Tokyo, Japan.
           
        15.3.3    DEMAND FOR ARBITRATION
           Any dispute relating to and/or arising out of this Agreement will be
           decided exclusively by binding arbitration under procedures which
           ensure efficient and speedy resolution.  

                                       26



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  treatment request.

           Such an arbitration may be commenced by either party involved in the 
           dispute (i) after the expiration of a sixty (60) day period following
           the written request to resolve the dispute, and/or (ii) at such 
           earlier time as any party involved repudiates and/or refuses to 
           continue with its obligations to negotiate in good faith. The 
           arbitration hearing will be conducted in the State of Hawaii, and 
           will be in the English language (with translators and interpretations
           as reasonable for the presentation of evidence and/or conduct of the 
           arbitration). Notwithstanding anything to the contrary, any party may
           apply to any court of competent  jurisdiction for interim injunctive 
           relief as may be allowed under applicable law with respect to 
           irreparable harm which cannot be avoided and/or compensated by such 
           arbitration proceedings, without breach of this Article 15.3.3 and 
           without any abridgement of the powers of the arbitrators.
           
           The arbitration will be conducted under the Rules of the Asia
           Pacific Arbitration Center.  Notwithstanding anything to the
           contrary, (i) the arbitrators will have the power to order discovery
           to the extent they find such discovery necessary to achieve a fair
           and equitable result and (ii) the arbitrators shall require pre-
           hearing exchange of documentary evidence to be relied upon by each
           of the respective parties in their respective cases in chief, and
           pre-hearing exchange of briefs, witness lists,and summaries of
           expected testimony.
           
           The arbitrators will make their decision in writing. 
           
        15.3.4    ARBITRATORS
           The arbitration will be conducted by three (3) arbitrators.  No
           person with a beneficial interest in the dispute under arbitration
           may be an arbitrator.  The parties will make reasonable efforts to
           select arbitrators with experience in the field of computers and
           law.
           
        15.3.5    BINDING EFFECT
           The decision or award rendered or made in connection with 

                                       27


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  treatment request.

           such arbitration will be binding upon the parties and judgment 
           thereon may be entered in any court having jurisdiction and/or 
           application may be made to such court for enforcement of such 
           decision or award. However, the arbitrators will not have the 
           authority to create any licenses.  They will only be permitted to 
           enforce licenses which the parties have otherwise agreed to in the 
           Agreement or the Existing Agreements.
           
        15.3.6    EXPENSES
           The expenses of the arbitrators will be shared equally by the
           parties; each party will otherwise be responsible for the costs and
           attorney's fees incurred by it; provided, however, if the
           arbitrators appointed in Article 15.3.4 find that the position of
           the non-prevailing party or parties in such arbitration was without
           substantial justification or was frivolous, the arbitrators may
           assess all of the costs and expenses together with reasonable
           attorney's fees against the non-prevailing party or parties.
           
   15.4 CONSEQUENTIAL DAMAGES
        IN NO EVENT WILL EITHER PARTY BE LIABLE TO THE OTHER PARTY FOR ANY
        INDIRECT, SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES (INCLUDING LOST
        PROFITS) WHETHER BASED ON WARRANTY, CONTRACT, TORT OR ANY OTHER LEGAL
        THEORY REGARDLESS OF WHETHER SUCH PARTY HAD ACTUAL OR CONSTRUCTIVE
        NOTICE OF SUCH DAMAGES; PROVIDED, HOWEVER, THIS LIMITATION WILL NOT
        APPLY IF THE DAMAGES OCCUR AS A RESULT OF GROSS NEGLIGENCE OR WILLFUL
        MISCONDUCT OF EITHER PARTY IN THE PERFORMANCE OF THEIR RESPONSIBILITIES
        UNDER THIS AGREEMENT.
       
   15.5 ASSIGNMENT
        Neither party will assign, transfer or otherwise dispose of this
        Agreement in whole or in part without the prior consent of the other
        party in writing, and such consent will not be unreasonably withheld. 
        Except in the case set forth in Article 14.3, above, this Agreement may
        be assigned to any Subsidiary or to a successor who has acquired a
        majority of the business or assets of the assigning party.

                                       28


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  15.6  PUBLIC ANNOUNCEMENTS
        Neither party will publicly announce the execution or existence of this
        Agreement or disclose the terms and conditions of this Agreement without
        first submitting the text of such announcement to the other party and
        receiving the approval of the other party of such text, which approval,
        unless public disclosure is required by a court or a government agency,
        may be withheld for any reason.  However, Lattice may disclose the
        existence and the terms of this Agreement in any document legitimately
        required to be filed with the Securities and Exchange Commission (and
        may file a copy of this Agreement required legitimately with such
        filing) or in accordance with generally accepted accounting procedures
        under the rules of the Securities and Exchange Commission or the
        National Association of Securities Dealers Automated Quotations stock
        market.
       
  15.7  NOTICE AND COMMUNICATIONS
        Any notices required or permitted to be given hereunder will be in
        English and be sent by (i) registered airmail or (ii) cable, facsimile
        or telex to be confirmed by registered airmail, addressed to:
        
        To Epson:  
                   281 Fujimi, Fujimi-machi, Suwa-gun
                   Nagano-ken 399-02, Japan
                   Attn: Nobuo Hashizume,
                         Director and Corporate General Manager     
                         Semiconductor Operations Division
                         Tel:  81-266-61-1211
                         Fax:  81-266-61-1270
       
        To SMOS:
                   150 River Oaks Parkway, San Jose, CA 95134-1951
                   U.S.A.
                   Attn: Tadakatsu Hayashi, President and CEO
                         Tel:  1-408-922-0200
                         Fax:  1-408-922-0238

        To Lattice:
                   5555 N.E. Moore Ct., Hillsboro, Oregon, 

                                       29


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                   97124-6421, U.S.A.
                   Attn: Cyrus Tsui
                         Chairman, President and Chief Executive Officer
                         Tel:  1-503-681-0118
                         Fax:  1-503-681-3077
       
        Any such notice will be deemed given at the time of its receipt by the
        addressee.
       
  15.8  RELATIONSHIP OF THE PARTIES
        Epson and Lattice are independent contractors and neither of them will
        be nor represent themselves to be the legal agent, partner or employee
        of the other party for any purpose.  Neither party will have the
        authority to make any warranty or representation on behalf of the other
        party nor to execute any contract or otherwise assume any obligation or
        responsibility in the name of or on behalf of the other party.  In
        addition, neither party will be bound by, nor liable to, any third
        person for any act or any obligations or debt incurred by the other
        party, except to the extent specifically agreed to in writing by the
        parties.
       
  15.9  WAIVER AND AMENDMENT
        Failure by either party, at any time, to require performance by the
        other party or to claim a breach of any provision of this Agreement will
        not be construed as a waiver of any right accruing under this Agreement,
        nor will it affect any subsequent breach or the effectiveness of this
        Agreement or any part hereof, or prejudice either party with respect to
        any subsequent action.  A waiver of any right accruing to either party
        pursuant to this Agreement will not be effective unless given in
        writing.
        
  15.10 SEVERABILITY
        In the event that any provision of this Agreement will be unlawful or
        otherwise unenforceable, such provision will be severed, and the entire
        agreement will not fail on account thereof, the balance continuing in
        full force and effect, and the parties will endeavor to replace the
        severed provision with a similar provision that is not unlawful or
        otherwise unenforceable.

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  15.11 RIGHTS AND REMEDIES CUMULATIVE
        The rights and remedies provided herein will be cumulative and not
        exclusive of any other rights or remedies provided by law or otherwise.
       
  15.12 HEADINGS
        The Article headings in this Agreement are for convenience only and will
        not be considered a part of, or affect the interpretation of, any
        provision of this Agreement.
       
  15.13 GOVERNING LANGUAGE
        This Agreement and all communications pursuant to it will be in the
        English language.  If there is any conflict between the English version
        and any translated version of this Agreement, the English version will
        govern.
       
  15.14 FORCE MAJEURE
        Except as otherwise expressly provided for herein, no party will be
        liable in any manner for failure or delay in fulfillment of all or part
        of this Agreement directly or indirectly owing to any causes or
        circumstances beyond its control, including, but not limited to, acts of
        God, governmental order or restrictions, war, war-like conditions,
        hostilities, sanctions, revolutions, riot, looting, strike, lockout,
        plague or other epidemics, fire and flood.
       
  15.15 COUNTERPARTS
        This Agreement may be executed in any number of counterparts, and all
        such counterparts will together constitute but one Agreement.
       
  15.16 INTEGRATION
        This Agreement sets forth the entire agreement and understanding between
        the parties as to its subject matter and supersedes all prior
        agreements, understandings and memoranda between the parties, except for
        the Existing Agreements.  No amendments or supplements to this Agreement
        will be effective for any purpose except by a written agreement signed
        by the parties.
       
  15.7  GOVERNMENT APPROVALS; EXPORT CONTROL LAWS
        Epson will file all reports and notifications that may be 

                                       31


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  treatment request.

        required to be filed with any agency of the Government of Japan in order
        to allow the performance of this agreement according to its terms.  
        Lattice will file all reports and notifications that may be required to 
        be filed with any agency of the Government of  U.S.A. in order to allow 
        the performance of this Agreement according to its terms.  Neither party
        will transmit indirectly or directly any Products or technical 
        information contained in the Confidential Information except in 
        accordance with applicable Japanese and United States export control 
        laws, regulations and procedures.

                                       32


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

       IN WITNESS WHEREOF, the parties have signed this Agreement as of the
       date first above written.
       
       
       
       LATTICE SEMICONDUCTOR CORPORATION              
       
       
       
       
       By:  /s/  CYRUS TSUI                                 
          --------------------------------------------------
       Name: Cyrus Tsui
       Title:     Chairman, President and Chief Executive Officer


  
       SEIKO EPSON CORPORATION
       
       
       
       
       By:  /s/ NOBUO HASHIZUME                       
          --------------------------------------------------
       Name: Nobuo Hashizume
       Title:     Director and Corporate General Manager
                  Semiconductor Operations Division
       
       
       S MOS Systems, Inc.




       By:  /s/ TADAKATSU HAYASHI                     
          --------------------------------------------------
       Name: Tadakatsu Hayashi
       Title:     President and CEO 

                                       33


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.


                                    EXHIBIT A

                         "Projected Completion Schedule"

                                    EXHIBIT B

                         "Process Road Map for Lattice"

                                    EXHIBIT C

                               "Payment Schedule"

                                    EXHIBIT D

                      "New Facility Production Capacity and
                           Supply/Purchase Commitment"

                                    EXHIBIT E

                         Price Determination Procedure"

                             "APP Offset Procedure"

                                     "( * )"

                                    EXHIBIT F

                                "Forecast System"

                                    EXHIBIT G

              "Epson's ( * ) Technology Road Map and ( * ) Process"

                                    EXHIBIT H

                              "Defect Density Goal"

                                    EXHIBIT I

                               "Turn Around Time"

                                       34


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT A
                          PROJECTED COMPLETION SCHEDULE
                                      ( * )

                                       35


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT B
                          PROCESS ROAD MAP FOR LATTICE
                                      ( * )

                                       36


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT C
                                PAYMENT SCHEDULE
                                      ( * )

                                       37


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT D
                     NEW FACILITY PRODUCTION CAPACITY PLAN 
                         AND SUPPLY/PURCHASE COMMITMENT
                                      ( * )

                                       38


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT E
                          PRICE DETERMINATION PROCEDURE
                                      ( * )
                              APP OFFSET PROCEDURE
                                      ( * )
                                      ( * )
                                      ( * )

                                       39


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT F
                                 FORECAST SYSTEM
                                      ( * )

                                       40


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT G
               EPSON'S ( * ) TECHNOLOGY ROAD MAP AND ( * ) PROCESS
                                      ( * )

                                       41


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT H
                               DEFECT DENSITY GOAL
                                      ( * )

                                       42


* Omitted and filed separately with the SEC pursuant to a confidential 
  treatment request.

                                    EXHIBIT I
                                TURN AROUND TIME
                                      ( * )

                                       43