I just measures the power consumption of built in RTC on A64. It was slightly over 50 uA!! A64 was completely powered off. Actually I was powering the RTC directly from external baterry (not over PMIC). Does anybody have any experience with built in RTC? Could it be rally that power hungry? For expmple PCF8563 takes only 0.5 uA.
pretty different parts....
Yeah. But whole point of RTC is to store time when power is off. If I try to use built in RTC, the battery I'm using (CR1220 37 mAh) can last only aprox 30 days instread of years wich the external RTC.
I would respectfulyl suggest that trying to run an a64 based part off a cr1220 is already "doign it wrong"
May I ask why? I didn't find the power consumtion in the datasheet so I needed to check it for myself. I just wanted to ensure if anybody else had same results.