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Accurate RTC using HSI

Question asked by bujak.dan on Jun 23, 2014
Latest reply on Jun 23, 2014 by Clive One
I'm using the SMT32F030 with 48MHz internal clock. I've configured the RTC and noticed it is about 8% fast. Is there a way to make this more accurate through calibration of some sort? Will that have to be done from part to part? Or is the only solution using an external crystal?