Exhibit 5.1

                     [Appleby Spurling & Kempe Letterhead]


                                                 JMVS/124194.04
                                                 Direct Telephone:(441) 298 3240
                                                 Direct e-mail: jvirgil@ask.bm

J Virgil Smith
ASSOCIATE


                                                 24 June 2002

Marvell Technology Group Ltd.
4th Floor, Windsor Place
22 Queen Street
P.O. Box HM 1179
Hamilton HM EX, Bermuda

Dear Sirs:

MARVELL TECHNOLOGY GROUP LTD.

We have acted as special legal counsel in Bermuda to Marvell Technology Group
Ltd., a Bermuda company (the "Company") in connection with its filing with the
United States Securities and Exchange Commission of a Registration Statement on
Form S-8 (the "Registration Statement") with respect to 215,000 shares of the
Company's common shares of par value US$0.002 per share (the "Common Shares") to
be issued pursuant to the terms of the share sale and purchase agreements
between the Company and certain former employees of SysKonnect GmbH, a wholly
owned subsidiary of the Company (the "Option Agreements").

For the purposes of this opinion we have examined and relied upon the documents
listed, and in some cases defined, in the Schedule to this opinion (the
"Documents") together with such other documentation as we have considered
requisite to this opinion.

ASSUMPTIONS

In stating our opinion we have assumed:

a)       the authenticity, accuracy and completeness of all documents submitted
         to us as originals and the conformity to authentic original documents
         of all documents submitted to us as certified, conformed, notarised or
         photostatic copies;

b)       the genuineness of all signatures on the Documents;

c)       that each of the Documents and other such documentation which was
         received by electronic means is complete, intact and in conformity with
         the transmission as sent;

Marvell Technology Group Ltd.        - 2 -                          24 June 2002


d)       that there are no provisions of the laws or regulations of any
         jurisdiction other than Bermuda which would have a material effect on
         any of the opinions herein expressed;

e)       that all representations and factual statements appearing in the
         Registration Statement, the Option Agreements and the Resolutions are
         true, accurate and complete in all material respects;

f)       that the Resolutions are in full force and effect and have not been
         rescinded, either in whole or in part, and accurately record the
         resolutions passed by the Board of Directors in a meeting which was
         duly convened and at which a duly constituted quorum was present and
         voting throughout and that there is no matter affecting the authority
         of the Directors to bring about the issue of the Common Shares by the
         Company under the terms of the Option Agreements, not disclosed by the
         Constitutional Documents or the Resolutions, which would have any
         adverse implication in relation to the opinions expressed herein;

g)       that the Option Agreements will constitute the legal, valid and binding
         obligations of the parties thereto, other than the Company;

h)       that each Director of the Company, when the Board of Directors of the
         Company passed the Resolutions, discharged his fiduciary duty owed to
         the Company and acted honestly and in good faith with a view to the
         best interests of the Company;

i)       that the Company has entered into its obligations under the Option
         Agreements in good faith for the purpose of carrying on its business
         and that, at the time it did so, there were reasonable grounds for
         believing that the transactions contemplated in the respective Option
         Agreements would benefit the Company;

j)       that at the time of issue by the Stock Option Committee of the Board of
         Directors (the "Committee") of any Common Shares pursuant to the Option
         Agreements, such Committee was duly constituted and at the date hereof
         remains a duly constituted committee of the Board of Directors of the
         Company having the necessary powers and authorities to issue the Common
         Shares pursuant to the Option Agreements;

k)       that the approval of the issue of any Common Shares under the Option
         Agreements will be duly made either at a duly convened and quorate
         meeting of the Board of Directors of the Company, or at a duly convened
         and quorate meeting of the Committee in a manner complying with the
         terms of the Bye-laws of the Company then in force and within the
         authority then given to the Committee by the Board of Directors of the
         Company;

l)       that when the issue of any Common Shares under Option Agreements is
         authorised, the issue price will not be less than the par value of the
         Common

Marvell Technology Group Ltd.        - 3 -                          24 June 2002


         Shares and that the Company will have sufficient authorised share
         capital to effect such issue and will continue to hold the necessary
         consent from the Bermuda Monetary Authority for such share issue;

m)       that in any case where Common Shares are issued by the Company pursuant
         to the Option Agreements on terms that do not require the allottee to
         pay to the Company a cash subscription price for such Common Shares,
         the Company will receive prior to the allotment of shares a transfer to
         it of assets from the allottee with a fair value at least equivalent to
         the aggregate par value of the Shares issued to him pursuant to the
         Option Agreements;

n)       that when filed with the Securities and Exchange Commission, the
         Registration Statement will not differ in any material respect from the
         draft referred to in paragraph 1 of the Schedule;

o)       that the records which were the subject of the Company Search were
         complete and accurate at the time of such search and disclosed all
         information which is material for the purposes of this opinion and such
         information has not since the date of the Company Search been
         materially altered; and

p)       that the records which were the subject of the Litigation Search were
         complete and accurate at the time of such search and disclosed all
         information which is material for the purposes of this opinion and such
         information has not since the date of the Litigation Search been
         materially altered.

OPINION

Based upon and subject to the foregoing and subject to the reservations set out
below and to any matters not disclosed to us, we are of the opinion that when
issued and allotted by the Board of Directors of the Company or by the Committee
pursuant to the Resolutions and Option Agreements and when fully paid for
pursuant to and in accordance with the terms and conditions of the Option
Agreements, as contemplated by the Option Agreements, the Common Shares will be
validly issued, fully-paid and non-assessable shares in the capital of the
Company.

RESERVATIONS

We have the following reservations:

(a)      We express no opinion as to any law other than Bermuda law and none of
         the opinions expressed herein relates to compliance with or matters
         governed by the laws of any jurisdiction except Bermuda. This opinion
         is limited to Bermuda law as applied by the courts of Bermuda at the
         date hereof.

(b)      Any reference in this opinion to Common Shares being "non-assessable"
         shall mean, in relation to fully paid shares of the Company and subject
         to any

Marvell Technology Group Ltd.        - 4 -                          24 June 2002


         contrary provision in any agreement in writing between the Company and
         the holder of such Common Shares, that no shareholder shall be bound by
         an alteration to the Memorandum of Association or Bye-laws of the
         Company after the date on which he became a shareholder, if and so far
         as the alteration requires him to take, or subscribe for additional
         shares, or in any way increases his liability to contribute to the
         share capital of, or otherwise to pay money to, the Company.

(c)      Searches of the Register of Companies at the office of the Registrar of
         Companies are not conclusive and it should be noted that the Register
         of Companies does not reveal:

         (i)      details of matters which have been lodged for filing or
                  registration which as a matter of general practice of the
                  Registrar of Companies would have or should have been
                  disclosed on the public file but have not actually been
                  registered or to the extent that they have been registered
                  have not been disclosed or do not appear in the public records
                  at the date and time the search is concluded; or

         (ii)     details of matters which should have been lodged for
                  registration but have not been lodged for registration at the
                  date the search is concluded.

(d)      In order to issue this opinion we have carried out the Searches as
         referred to in paragraphs 4 and 5 of the Schedule and have not enquired
         as to whether there has been any change since the date of the Searches.

(e)      We have relied upon the statements made in the Officers Certificate
         referred to in paragraph 9 of the Schedule. We have made no independent
         verification of the matters referred to in the certificate and we
         qualify this opinion to the extent that the statements made in the
         certificate are not accurate in any respect.

DISCLOSURE

This opinion is addressed to you in connection with the registration of the
Common Shares with the Securities and Exchange Commission. Further, this opinion
speaks as of its date and is strictly limited to the matters stated herein and
we assume no obligation to review or update this opinion if applicable law or
the existing facts or circumstances should change. We hereby consent to the
inclusion of the opinion as an exhibit to the Registration Statement.

This opinion is governed by and is to be construed in accordance with Bermuda
law. It is given on the basis that it will not give rise to any legal
proceedings with respect thereto in any jurisdiction other than Bermuda.

Yours faithfully


/s/ APPLEBY SPURLING & KEMPE





                                    SCHEDULE

1.       An electronic copy of the draft of the Registration Statement received
         from Marvell Semiconductor, Inc. on 18 June 2002 (excluding the
         exhibits and excluding the documents incorporated by reference).

2.       An electronic copy of draft 4 of the Marvell Share Sale and Purchase
         Form Agreement received from Marvell Semiconductor, Inc. on 21 June
         2002.

3.       Certified copy of the Minutes of the meeting of the Board of Directors
         of the Company held on 12 June 2002 (the "Resolutions").

4.       The entries and filings shown in respect of the Company on the file of
         the Company maintained in the Register of Companies at the office of
         the Registrar of Companies in Hamilton, Bermuda, as revealed by a
         search done on 24 June 2002 (the "Company Search");

5.       The entries and filings shown in respect of the Company in the Supreme
         Court Causes Book maintained at the Registry of the Supreme Court in
         Hamilton, Bermuda, as revealed by a search done on 24 June 2002 (the
         "Litigation Search");

         (The Company Search and the Litigation Search are collectively referred
         to as the "Searches")

6.       Copies of the Certificate of Incorporation, Memorandum of Association
         and Bye-laws of the Company incorporating all amendments to 21 June
         2001 (collectively referred to as the "Constitutional Documents");

7.       A copy of the permissions dated 31 May 2000 given by the Bermuda
         Monetary Authority under the Exchange Control Act (1972) and related
         regulations for the issue of shares in the capital of the Company;

8.       A Certificate of Compliance dated 13 March 2002 issued by the Ministry
         of Finance in respect of the Company; and

9.       A fax copy of an Officer's Certificate dated 21 June 2002 and signed by
         George A. Hervey as Vice President of Finance and Chief Financial
         Officer of the Company confirming the authorised and issued share
         capital of the Company as at that date.