using OSCULP32K as time keeping purpose
Hi, has anyone used internal 32kHz ULP OSC for calendar time keeping ? I'd like to use it if possible, but the frequency shifts as Vdd and temperature. I did worst case calculation and find it can end up off by many days after 1 year.
I intend to use it as time keeping for environmental sensor, but if it is off by days it won't be useful. But I may overestimate the error, just want to see if anyone has experience on this.