Exhibit 99.1

      PERICOM SEMICONDUCTOR ANNOUNCES POSTPONEMENT OF EARNINGS ANNOUNCEMENT
     AND CONFERENCE CALL AND INTENT TO RESTATE INTERIM FINANCIAL RESULTS FOR
                                   FISCAL 2005

     SAN JOSE, Calif., Aug. 2 /PRNewswire-FirstCall/ -- Pericom Semiconductor
Corporation (Nasdaq: PSEM) today announced that its fiscal fourth quarter and
full year earnings release and conference call scheduled for Thursday,
August 4, 2005 will be delayed. A press release announcing the rescheduled time
is expected to be issued not later than August 8, 2005.

     The reason for the delay is to allow the Company additional time to
determine the effects of a restatement on previously reported financial results
for the first three quarters of fiscal 2005. The restatement is the result of
certain new product research and development costs (initial wafer production
costs) that were incorrectly capitalized into inventory. As a result of the
restatement, engineering expenses will increase in each quarter of fiscal 2005
from amounts previously reported and inventory and cost of sales will decrease
from amounts previously reported. Future gross margin will be benefited to the
extent previously expensed new product costs are subsequently sold. The
Company's initial assessment of the impact of this change indicates a net
reduction to pre-tax profits for the nine months ended March 31, 2005 of not
more than $700,000. The Company is assessing the impact on its tax rate and
believes that diluted net income per share for the year will be reduced by one
to two cents per share. The impact on each quarter of fiscal year 2005 from this
restatement will be disclosed in the fourth quarter and full year earnings
release and fiscal 2005 annual report on Form 10-K. Management has determined
the impact on the prior fiscal year is immaterial.

     Management is considering the effect of these restatements on its
evaluation of disclosure controls and procedures and internal controls over
financial reporting.

     Pericom Semiconductor Corporation offers customers worldwide the industry's
most complete silicon and quartz based solutions for the Computing,
Communications, and Industrial market segments. Our broad portfolio of
leading-edge analog, digital, and mixed-signal integrated circuits and SaRonix
frequency control products are essential in the timing, transferring, routing,
and translating of high-speed signals as required by today's ever-increasing
speed and bandwidth demanding applications. Company headquarters are in San
Jose, California, with design centers and sales offices located globally.
http://www.pericom.com .



     This press release contains forward-looking statements as defined under The
Securities Litigation Reform Act of 1995, including statements relating to the
expected impact of the restatement on the Company's historical financial
statements and results of operations, and the anticipated impact of the revised
accounting treatment of certain new product research and development costs on
the Company's future financial statements and results of operations. All
forward-looking statements included in this document are made as of the date
hereof, based on information available to the company as of the date hereof, and
Pericom assumes no obligation to update any forward-looking statements. Parties
receiving this release are encouraged to review our annual report on Form 10-K/A
for the year ended June 30, 2004 and, in particular, the risk factors sections
of that filing.

SOURCE  Pericom Semiconductor Corporation
     -0-                             08/02/2005
     /CONTACT:  Mike Craighead, VP/Chief Financial Officer of Pericom,
+1-408-435-0800/
     /Web site:  http://www.pericom.com /

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