SLAZ180P October 2012 – May 2021 MSP430F247
XOSC Module
Functional
XT2 crystal failures may not be properly detected by the oscillator fault circuitry
The XT2OF flag should be set if the XT2 frequency falls below 30kHz. If there is no oscillation at all, the flag will still operate properly. However, 0-30kHz produces an undefined state on XT2OF. When this occurs, OFIFG will not be set.
Do not depend on the fault detection circuitry to accurately detect all failures.