Judge Kenneth E. Lester set a date for a so-called docket sounding 8:30 a.m., Aug. 8. That's when a trial date will be set unless Zimmerman's attorney, Mark O'Mara, asks for a continuance.
Zimmerman, who remains free after posting $150,000 bond, did not attend the hearing.
O'Mara earlier filed a written plea of not guilty and waived Zimmerman's appearance at the arraignment.
Zimmerman, 28, has said he was acting in self-defense in the Feb. 26 shooting of Martin, 17, in a Sanford gated community.
Authorities didn't charge Zimmerman in the shooting of the Miami Gardens teen for more than six weeks, sparking national protests led by Martin's parents and civil rights groups.
Zimmerman is at an undisclosed location but is being monitored by authorities with a GPS device. He has surrendered his passport and must observe a 7 p.m.-to-6 a.m. curfew under the terms of his release.
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