Real time counter drift

[ashokhirpara]

Hi I am using nRF52832. I want to use Real time counter of this chip for time keeping just like external RTC. Can you tell how much drift my system will get in time ? We are using external LF crystal.

From,

Smitesh Mali

[Sigurd]

Hi,

You can calculate the drift using the crystal’s frequency tolerance / ppm value. This value can be found in the datasheet for the crystal you are using. You can then use calculators like on this site to find the drift in seconds per day.