Other Parts Discussed in Thread: MSP430FR2433
MSP430FR2422 used as RTC with 3.0v battery as backup.
System runs @ 5v supply during normal operation (AM).when no power (5v) system switches to 3.0v battery supply and controller switches
to LPM3,5 with wakeup source as pin interrupt and RTC timer overflow interrupt .
Problem Case: when system running from 5v in active mode ,some time controller hangs and never recovers. Only recovers on Power on reset.
Note : When controller hangs its observed that its always in active mode not in LPM.