According to NXP datasheet internal RTC power consumption is 50uA. The mentioned battery has a 35mAh capacity. So in ideal case it should last around 700 hours or 29 days. But in reality I’d expect something around 500 hours.
Hi @alex.tx ,
I have a follow up question on this topic. I tried to use a SMU as the VCC_BACKUP, but I only see it draws around 0.6uA, which is around 100 times smaller than the spec
Is this a normal behavior?
Note: We dint connect external RTC chip, so the below line is expected. (We want to test internal RTC) rtc-ds3232: probe of 18-0068 failed with error -5
We haven’t done any power consumption measurement related to internal RTC. NXP datasheet defines maximum of 50uA RTC consumption. Looks like actual consumption is lower.