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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F469AE датащи(PDF) 116 Page - STMicroelectronics |
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STM32F469AE датащи(HTML) 116 Page - STMicroelectronics |
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116 / 220 page  Electrical characteristics STM32F469xx 116/220 DS11189 Rev 7 Figure 29. High-speed external clock source AC timing diagram Figure 30. 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 Cin(LSE) OSC32_IN input capacitance(1) -- 5 - pF DuCy(LSE) Duty cycle - 30 - 70 % IL OSC32_IN Input leakage current VSS VIN VDD -- ±1 µA 1. Guaranteed by design. Table 36. Low-speed external user clock characteristics (continued) Symbol Parameter Conditions Min Typ Max Unit ai17528 OSC_IN External STM32F clock source VHSEH tf(HSE) tW(HSE) IL 90 % 10 % THSE t tr(HSE) tW(HSE) fHSE_ext VHSEL ai17529 OSC32_IN External STM32F clock source VLSEH tf(LSE) tW(LSE) IL 90% 10 % TLSE t tr(LSE) tW(LSE) fLSE_ext VLSEL |
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