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AM3354从nand启动停止

Other Parts Discussed in Thread: TPS65217

刚开始烧写一批板子后,启动很正常,一直都可以启动。用一段时间后,有部分(比例很高)就不能正常启动了,反复开关很多次,偶尔又能正常启动,这些不能启动的板子重新烧写后,又可以正常启动了,可能用上一段时间后又会出现这种情况,又只有重新烧写。这是什么原因?