I am using a KL16 and currently using the 4Mhz Internal Reference Clock. However, in order to reduce current consumption I would like to switch to my 32kHz crystal.
Since 32 kHz is not fast enough for my calculations and timers, i need to enable the FLL. However, is it possible to use that mode in VLPR mode as again I want to minimise the current consumption as much as possible. Would that work in any of the low power modes or can I only run it in Normal Run Mode.
In sleep modes (VLLS), is it more efficient to use the 32kHz crystal or the dedicated Low Power timer running off the LPO.