EXHIBIT 32.1


                     COMPUTER ACCESS TECHNOLOGY CORPORATION

                                  CERTIFICATION

      In  connection  with the  periodic  report of Computer  Access  Technology
Corporation  (the "Company") on Form 10-Q for the period ended June 30, 2004, as
filed with the Securities and Exchange  Commission  (the  "Report"),  I, Carmine
Napolitano, President and Chief Executive Officer of the Company, hereby certify
as of the date hereof, solely for purposes of Title 18, Chapter 63, Section 1350
of the United States Code, that to the best of my knowledge:

      (1) the Report fully  complies with the  requirements  of Section 13(a) or
15(d), as applicable, of the Securities Exchange Act of 1934, and

      (2) the  information  contained  in the  Report  fairly  presents,  in all
material  respects,  the  financial  condition  and results of operations of the
Company at the dates and for the periods indicated.

      A signed  original of this written  statement  required by Section 906, or
other  document  authenticating,   acknowledging,   or  otherwise  adopting  the
signature  that  appears in typed form  within  the  electronic  version of this
written statement  required by Section 906, has been provided to the Company and
will be retained by the Company and  furnished  to the  Securities  and Exchange
Commission or its staff upon request.

      This Certification has not been, and shall not be deemed, "filed" with the
Securities and Exchange Commission.


Date: August 13, 2004                By:  /s/  CARMINE J. NAPOLITANO
                                         ------------------------------------
                                         Carmine J. Napolitano
                                         President and Chief Executive Officer