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DM368 采用432M主频 DDR340M时 画面抖动

您好,

之前dm368跑的365的配置 297M主频DDR270M,画面正常。后来由于要支持1080P,需要跑368的配置,配置主频432 DDR340M,画面抖动,当我把主频降为170M后正常(PPL1DIV7=0x8001),请问是什么原因?谢谢