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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F479AI датащи(PDF) 112 Page - STMicroelectronics |
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STM32F479AI датащи(HTML) 112 Page - STMicroelectronics |
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112 / 208 page  Electrical characteristics STM32F479xx 112/208 DocID028010 Rev 2 Figure 27. High-speed external clock source AC timing diagram Figure 28. Low-speed external clock source AC timing diagram High-speed external clock generated from a crystal/ceramic resonator The high-speed external (HSE) clock can be supplied with a 4 to 26 MHz crystal/ceramic resonator oscillator. All the information given in this paragraph are based on characterization results obtained with typical external components specified in Table 37. In the application, the resonator and the load capacitors have to be placed as close as possible to the oscillator pins in order to minimize output distortion and startup stabilization time. Refer to the crystal resonator manufacturer for more details on the resonator characteristics (frequency, package, accuracy). Table 37. HSE 4-26 MHz oscillator characteristics (1) Symbol Parameter Conditions Min Typ Max Unit fOSC_IN Oscillator frequency - 4 - 26 MHz RF Feedback resistor - - 200 - k Ω |
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