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STM32F107VC 数据表(PDF) 45 Page - STMicroelectronics |
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STM32F107VC 数据表(HTML) 45 Page - STMicroelectronics |
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45 / 95 page  STM32F105xx, STM32F107xx Electrical characteristics Doc ID 15274 Rev 4 45/95 Figure 13. High-speed external clock source AC timing diagram Figure 14. 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 3 to 25 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 22. 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). ai14127b OSC _IN External STM32F10xxx clock source VHSEH tf(HSE) tW(HSE) IL 90% 10% THSE t tr(HSE) tW(HSE) fHSE_ext VHSEL ai14140c OSC32_IN External STM32F10xxx clock source VLSEH tf(LSE) tW(LSE) IL 90% 10% TLSE t tr(LSE) tW(LSE) fLSE_ext VLSEL |
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