Datasheet

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STM32F031x4 STM32F031x6 Electrical characteristics

Note: For information on selecting the crystal, refer to the application note AN2867 “Oscillator

design guide for ST microcontrollers” available from the ST website www.st.com.

Figure 17. Typical application with a 32.768 kHz crystal

Note: An external resistor is not required between OSC32_IN and OSC32_OUT and it is forbidden

to add one.

6.3.8 Internal clock source characteristics

The parameters given in Table 35 are derived from tests performed under ambient

temperature and supply voltage conditions summarized in Table 18: General operating

conditions. The provided curves are characterization results, not tested in production.

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