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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L431 датащи(PDF) 112 Page - STMicroelectronics |
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STM32L431 датащи(HTML) 112 Page - STMicroelectronics |
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112 / 200 page  Electrical characteristics STM32L431xx 112/200 DocID028800 Rev 1 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 23. 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. 1. Guaranteed by design. 2. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator design guide for ST microcontrollers”. 3. tSU(LSE) is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation is reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer |
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