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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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STM32F301C6 Fiches technique(PDF) 73 Page - STMicroelectronics |
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STM32F301C6 Fiches technique(HTML) 73 Page - STMicroelectronics |
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73 / 135 page  DocID025146 Rev 6 73/135 STM32F301x6 STM32F301x8 Electrical characteristics 114 6.3.7 External clock source characteristics High-speed external user clock generated from an external source In bypass mode the HSE oscillator is switched off and the input pin is a standard GPIO. The external clock signal has to respect the I/O characteristics in Section 6.3.14. However, the recommended clock input waveform is shown in Figure 14. Figure 14. High-speed external clock source AC timing diagram Table 40. High-speed external user clock characteristics Symbol Parameter Conditions Min Typ Max Unit fHSE_ext User external clock source frequency(1) 1. Guaranteed by design. - 18 32 MHz VHSEH OSC_IN input pin high level voltage 0.7VDD -VDD V VHSEL OSC_IN input pin low level voltage VSS -0.3VDD tw(HSEH) tw(HSEL) OSC_IN high or low time(1) 15 - - ns tr(HSE) tf(HSE) OSC_IN rise or fall time(1) -- 20 |
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