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MSP430FR5994: 关于从LPM3.5唤醒到执行Main的第一条函数的时间大于数据手册的时间

Part Number: MSP430FR5994

1:程序设定RTC时间100mS,拉低P3.7引脚,进入睡眠,。

2:RTC唤醒后,停止看门狗,拉高P3.7引脚,

3:测试低电平时间实际时间112.9ms,大于手册的350us,

4:将程序串口初始化和一些程序屏蔽后测试低电平时间为104.4ms.

5:片子醒来时,先初始化的外部晶振,在进行解锁,已经排除等待时钟稳定的问题。