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K82 : optimal clock tree

Question asked by Eugene Hiihtaja on Jan 10, 2019
Latest reply on Jan 11, 2019 by Eugene Hiihtaja

Hello !


I would like to create optimal clock tree for my configuration. I think by using it I can have less power consumption

in RUN mode and LLS mode. And have fast wakeup from LLS3 to RUN by using external/internal LLWU as wakeup source.


I have both crystal oscillators and use couple I2C ( mastrer and slave), RTC, WDOG and LPUART for debug terminal.

LTC and TRNG in use as well. LPO is need for LLWU.


I can see from DS that IRC48 if used consume something and better to avoid usage of it.

I need core/system clock 120 Mhz and Bus clock 60 Mhz.  


But MCG might have different configuration.

LPUART can take clock from crystal oscillator directly.


What can be overall clocking scheme recommendations what lead to lower power consumption and fast wakeup

from LLS3 by using LLWU ?