The singer, 25, was arrested in October outside a hotel and charged with misdemeanor assault. A fan accused the singer of hitting him when he tried to get in a photograph Brown was taking with two women. At the time, Brown was on probation for a 2009 attack on singer Rihanna, his then girlfriend.
He was released from jail earlier this month.
Prosecutor Kevin Chambers said Wednesday they offered a deal for Brown to plead guilty to simple assault and time served in the Washington case. But the Grammy-winning singer's attorney, Mark Geragos, said defense lawyers and prosecutors couldn't agree on a statement of facts about what happened outside the W hotel.
"They wanted him to read from a script that wasn't true," Geragos said after the hearing. The attorney did not say specifically what the disagreement was over.
Brown was in court Wednesday, wearing white jeans, a white shirt, a leather jacket and a black tie. His trial was scheduled for Sept. 8.
Brown's bodyguard, Christopher Hollosy, was also charged in the same Washington scuffle. He was accused of being the second person after Brown to strike Parker Adams.
Hollosy was convicted of misdemeanor assault in April. He has not yet been sentenced.