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STM32F101X4 Datasheet(PDF) 41 Page - STMicroelectronics |
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STM32F101X4 Datasheet(HTML) 41 Page - STMicroelectronics |
41 / 73 page STM32F101x4, STM32F101x6 Electrical characteristics Doc ID 15058 Rev 3 41/74 Low-speed external user clock generated from an external source The characteristics given in Table 20 result from tests performed using an low-speed external clock source, and under the ambient temperature and supply voltage conditions summarized in Table 8. Table 19. 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, not tested in production. 18 25 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(HSE) tw(HSE) OSC_IN high or low time(1) 16 ns tr(HSE) tf(HSE) OSC_IN rise or fall time(1) 20 Cin(HSE) OSC_IN input capacitance(1) 5pF DuCy(HSE) Duty cycle 45 55 % IL OSC_IN Input leakage current VSS VIN VDD ±1 µA Table 20. Low-speed external user clock characteristics Symbol Parameter Conditions Min Typ Max Unit fLSE_ext User external clock source frequency(1) 1. Guaranteed by design, not tested in production. 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) tw(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) 5pF DuCy(LSE) Duty cycle 30 70 % IL OSC32_IN Input leakage current VSS VIN VDD ±1 µA |
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