Thank you for replying.Yuri Muhin
But I'm not sure I couldn't access above link because of "Unauthorized" page.
Could you send another link or allow my access?
BTW it was my mistake to use "warm boot" for restart after power off. Sorry for confusing you.
And I also agree with POR always recommended but what I want to know is ...
which peripherals can power off during deep sleep(state retention) in order to save power?
I assume it is ok to keep power on during deep sleep if peripheral restart process(reset) is too complicated or takes time.
I would be pleased if you can answer as soon as possible.
Many Advanced Thanks,