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The device may enter a lockup state during an interrupt-triggered wake up from LPM3 or LPM4. The device will remain in lockup state, unable to respond to the interrupt or continue application execution, until a power cycle brings it back to reset state.
感谢您的答复，我这边尝试了，使用LPM2来代替LPM3确实能够解决这一问题，但是功耗相差很大。而且勘误表中提到可以使用LPM3.5 or LPM4.5：
2) If the application only uses RTC or GPIO as a wakeup source, use LPM3.5 or LPM4.5
instead. Refer to the device specific datasheet for details on LPM3.5/LPM4.5 wake up
times and power consumption.
但是不知道实际应用中如何使用LPM3.5 or LPM4.5。
msp430fr69xx_lpm3-5_01.c RTC_C, LPM3.5, & alarm
msp430fr69xx_lpm4-5_01.c Entering and waking up from LPM4.5 via P1.3 interrupt
msp430fr69xx_lpm4-5_02.c Entering and waking up from LPM4.5 via P1.3 interrupt with SVS disabled
