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RTC_B的时钟来源是32K的晶体,通常是XT1, 设计中需要RTC一直计时,低功耗,xt1就不能关闭,这是不是有违于低功耗的设计?还是我对RTC_B的用法理解的不正确,是否还有别的解决方案。
参考http://www.ti.com.cn/cn/lit/ug/slau208m/slau208m.pdf 564 页 Table 21-1. RTC Overview
可知 RTC_B 是支持低功耗模式的