The SIA spokesperson confirmed Wednesday that Ruiz has bowed out of the event, but did not provide further details. Ruiz, who remain's SIA's 2009 chairman until the organization's annual meeting Thursday, had been scheduled to give a talk titled "Chairman's Reflections" at the dinner in San Jose, Calif.

In Ruiz's absence, SIA President George Scalise will present the review of 2009 normally handled by the outgoing SIA chairman, the spokesperson said.

Hector Ruiz

Ruiz, formerly chairman and CEO of Advanced Micro Devices Inc., allegedly supplied confidential information about AMD's plans to spin off its manufacturing operations to a defendant in the Galleon Group insider-trading case, according to a report last week by the Wall Street Journal.

Six people, including the founder of hedge fund Galleon Group, have been charged related to alleged insider trading over the spinout of AMD's manufacturing arm into Globalfoundries, a joint venture between AMD and Abu Dhabi's Advanced Technology Investment Co. Ruiz has not been charged with any wrongdoing.

Ruiz stepped down Monday from his position as chairman of Globalfoundries.