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AM3358使用内部RTC遇到异常导致内核起不来

Other Parts Discussed in Thread: AM3358

单板是采用外部纽扣电池3V通过电源芯片转换成1.8V给AM3358的内部RTC供电,电池电量充足的时候,系统启动正常。取下电池的时候,系统也启动正常。但是在电池使用一段时间以后,系统有时候在启动过程中会内核卡死在RTC初始化附近,而且不容易复现,请问下有什么解决方案不?