When the customer used the internal RTC timer to test the wake up function, it was found that the timing time was off by 20%.The clock tree output is as follows.Thanks!
The precision of the LPO clock is not high, which leads to inaccurate timing of the RTC, but the RTC clock can be compensated through the TCR register to improve the precision of the RTC.
This is a document summarized in Chinese, which introduces how to compensate the RTC clock, and hopes to be helpful to your customers.
For users who have strict requirements on the RTC clock, it is recommended to add an external clock circuit
