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1，测试发现MSP430FR4133好像可以用RTC唤醒，而且功耗比LPM3低近一半，
2，《MSP430FR4xx and MSP430FR2xx Family User's Guide 》第1.4章节中好像又说可以唤醒
3. 《msp430fr4133_数据表_EN》第6.2章节中明确说明RTC是关闭的
请各们高手帮我解释一下原因，谢谢！！！
lpm4状态下rtc都被关闭了。。。不能唤醒mcu的。
如果需要用rtc唤醒，楼主可以考虑下lpm3.5，这个状态功耗也非常低
