The RTC embedded in the STM32F101xx and STM32F103xx comes with a digital clock calibration circuit suitable for manufacturing environments, that allows applications to compensate for crystal and temperature variations. This application note discusses the RTC calibration basics and explains how RTC calibration can be used to improve timekeeping accuracy.

ALIENTEK MINISTM32 扩展实验（合肥工业大学）汉字显示实验\EX\chfont.h
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