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急!急!急!新作回来的板子DSP还没刷程序就显示已锁请问是什么原因??



如题,新作的一批28335板子,第一次上电刷成,连接上后点击flash programmer 弹出输入密钥框,显示被锁。连续测量几个板子都是这样的问题