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STM32F072CB 数据表(PDF) 70 Page - STMicroelectronics |
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STM32F072CB 数据表(HTML) 70 Page - STMicroelectronics |
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70 / 128 page  Electrical characteristics STM32F072x8 STM32F072xB 70/128 DocID025004 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 41 are derived from tests performed under ambient temperature and supply voltage conditions summarized in Table 24: General operating conditions . The provided curves are characterization results, not tested in production. |
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