We have been considering to use Kinetis KL16 with their product.
Now we would like to estimate the system boot up time .
In the data sheet KL16P64M48SF5 Rev 5 : Table 18 MCG spec , tFLL_acquire is 1ms ( Max).
Note 8 : This specification applies to any time the FLL reference source or reference divider is changed,
trim value is changed,DMX32 bit is changed, DRS bits are changed,
or changing from FLL disabled (BLPE, BLPI) to FLL enabled (FEI, FEE,FBE, FBI).
If a crystal/resonator is being used as the reference, this specification assumes it is already running.
How long does it take time to change a state form FEI mode to FBI mode ?
Is it 1ms (Max) or immediate ?