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STM32F103CBU6XXX 数据表(PDF) 49 Page - STMicroelectronics |
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STM32F103CBU6XXX 数据表(HTML) 49 Page - STMicroelectronics |
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49 / 92 page  STM32F103x8, STM32F103xB Electrical characteristics Doc ID 13587 Rev 11 49/92 Figure 20. High-speed external clock source AC timing diagram Figure 21. 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 16 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). ai14143 OSC _IN EXTER NAL STM32F103xx CLOCK SOURC E VHSEH tf(HSE) tW(HSE) IL 90% 10% THSE t tr(HSE) tW(HSE) fHSE_ext VHSEL ai14144b OSC32_IN EXTER NAL STM32F103xx CLOCK SOURC E VLSEH tf(LSE) tW(LSE) IL 90% 10% TLSE t tr(LSE) tW(LSE) fLSE_ext VLSEL |
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