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AN2629 数据表(PDF) 21 Page - STMicroelectronics

部件名 AN2629
功能描述  low-power modes
PDF  43 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN2629 数据表(HTML) 21 Page - STMicroelectronics

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AN2629
Backup registers (BKP)
Doc ID 13922 Rev 2
21/43
4.4
RTC calibration
For measurement purposes, the 32.768 kHz RTC clock can be output on the TAMPER pin.
This is enabled by setting the CCO bit in the RTC clock calibration register (BKP_RTCCR).
The clock can be slowed down by up to 121 ppm by configuring CAL[6:0] bits.



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