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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L152C6 датащи(PDF) 70 Page - STMicroelectronics |
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STM32L152C6 датащи(HTML) 70 Page - STMicroelectronics |
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70 / 131 page  Electrical characteristics STM32L151x6/8/B, STM32L152x6/8/B 70/131 DocID17659 Rev 9 Low-speed external user clock generated from an external source The characteristics given in the following table result from tests performed using a low- speed external clock source, and under ambient temperature and supply voltage conditions summarized in Table 13. Figure 16. 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 1 to 24 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 28. 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 Table 27. Low-speed external user clock characteristics(1) 1. Guaranteed by design, not tested in production 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) tw(LSE) OSC32_IN high or low time 465 - - ns tr(LSE) tf(LSE) OSC32_IN rise or fall time - - 10 CIN(LSE) OSC32_IN input capacitance - - 0.6 - pF DuCy(LSE) Duty cycle - 45 - 55 % IL OSC32_IN Input leakage current VSS ≤ VIN ≤ VDD -- ±1 µA ai18233 OSC32_IN EXTER NAL STM32Lxx CLOCK SOURC E VLSEH tf(LSE) tW(LSE) IL 90% 10% TLSE t tr(LSE) tW(LSE) fLSE_ext VLSEL |
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