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STM32F042F4 数据表(PDF) 64 Page - STMicroelectronics |
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STM32F042F4 数据表(HTML) 64 Page - STMicroelectronics |
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64 / 117 page  Electrical characteristics STM32F042x4 STM32F042x6 64/117 DocID025832 Rev 5 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 18. 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 38 are derived from tests performed under ambient temperature and supply voltage conditions summarized in Table 21: General operating conditions . The provided curves are characterization results, not tested in production. |
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