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am4379的RTC时钟,断电之后时钟不走

Other Parts Discussed in Thread: AM4379

大家好,请问am4379的RTC时钟断电之后时钟不走是为什么呢?上电之后RTC时钟可以走,已经安装纽扣电池了。而且直接断电RTC无法保存,需要用命令关机才能保存RTC时间,这个是正常的么?