SLAZ318AC October 2012 – September 2021 MSP430F5633
RTC Module
Functional
RTC_B module can seem stuck or function abnormally (jumping RTC)
If VBAT and DVCC (VPRIM) power up slowly and cross around the VBAK switching threshold, internal functions may not reset properly.
This can lead to a stuck RTC_B module or to unexpected functionality e.g. RTC_B is running faster which causes the observed time value to jump or skip forward.
Prevent DVCC (VPRIM) and VBAT from crossing each other below 2V during power up. It does not matter which signal comes up first.