SLAZ392AH October 2012 – August 2021 MSP430FR5739
XOSC Module
Functional
XT1 in bypass mode does not work with RTC enabled
When the RTC module is enabled and XT1 is configured in bypass mode to be sourced by an external digital signal, the XT1OFFG flag is set indefinitely, resulting in ACLK defaulting its clock source to VLO instead of XT1.
Do not use RTC module with XT1 in bypass mode with external digital clock source.