"Farces take place in your presence," he said in remarks directed to the judge that were referring to a recording leaked to the news media of what he had thought was a private conversation between him and his lawyer.
He maintained that he remains the country's legitimate president and called upon the people of Egypt to continue "their peaceful revolution."
"People are aware of the truth behind the coup," Morsy said.
Morsy repeated his earlier assertion that the court proceeding was unconstitutional, describing it in English as "null and void."
Morsy has been charged with inciting the killings of political opponents and organizing a 2011 jailbreak by members of his then-banned Muslim Brotherhood.
Morsy, the former head of the Brotherhood's political arm, won office in 2012. Shortly after he was elected, he resigned from the Muslim Brotherhood and its Freedom and Justice party in an effort to show he would represent all Egyptians.
But he was ousted in a coup a year later amid widespread protests against his rule, with opponents accusing him of pursuing an Islamist agenda and excluding other factions from the government.
Morsy and other Brotherhood leaders were rounded up after the coup.
The Brotherhood had long been suppressed during the 29-year rule of Mubarak. But it emerged as the most powerful political force in Egypt after the popular revolt that toppled Mubarak in 2011.
Rights groups and other pundits say the military-backed government that replaced Morsy has returned to the authoritarian practices of Mubarak, if not worse.