MPC55xx,External Reference Mode-- 16MHz , and the system clock is 132MHz.
The other SYNCR's configuration is as follows:
FMPLL_SYNCR[LOCEN] = 0;
FMPLL_SYNCR[LOLRE] = 0;
FMPLL_SYNCR[LOCRE] = 0
If the external clocks fall below the threshold frequency, what the system will happen ? stop ,or enter self-clock mode ?