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AM5728: AM5728下进去程序,启动不了

Part Number: AM5728


HI

  采用控制器AM5728,使用SD卡可以启动,通过USB接口下进去程序后,拔掉SD卡,AM5728启动不了,如下图所示,AM5728模式设置,P12,P13,P14的2引脚没有处于悬空态。请问是哪里出了问题?