Originally posted by Melanie
Be warned about RTC's NVRAM...

...it's only NV as long as there's some form of power on the chip...
Melanie, thanks for pointing that out.

For the current application this shouldn't be much of a problem
as the RTC has a good lithium battery backup.
If the Power-Supply AND the backup would fail at the same time
the Device would need Maintenance anyway, as the RTC would have lost it's Time Setting.