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STM32F401CBU6 데이터시트(PDF) 75 Page - STMicroelectronics |
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STM32F401CBU6 데이터시트(HTML) 75 Page - STMicroelectronics |
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75 / 135 page ![]() Electrical characteristics STM32F401xB STM32F401xC 75/135 DocID024738 Rev 6 Figure 22. High-speed external clock source AC timing diagram Table 36. Low-speed external user clock characteristics Symbol Parameter Conditions Min Typ Max Unit fLSE_ext User External clock source frequency(1) - 32.768 1000 kHz VLSEH OSC32_IN input pin high level voltage 0.7VDD -VDD V VLSEL OSC32_IN input pin low level voltage VSS -0.3VDD tw(LSE) tf(LSE) OSC32_IN high or low time(1) 450 - - ns tr(LSE) tf(LSE) OSC32_IN rise or fall time(1) -- 50 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. |
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