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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32WL55JC датащи(PDF) 102 Page - STMicroelectronics |
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STM32WL55JC датащи(HTML) 102 Page - STMicroelectronics |
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102 / 147 page  Electrical characteristics STM32WL55/54xx 102/147 DS13293 Rev 2 The external clock signal has to respect the I/O characteristics detailed in Section 5.3.16: I/O port characteristics.The recommend clock input waveform is shown in the figure below. Figure 17. Low-speed external clock source AC timing diagram 5.3.10 Internal clock source characteristics Parameters given in the table below are derived from tests performed under ambient temperature and supply voltage conditions summarized in Table 25: General operating conditions. The provided curves are characterization results, not tested in production. High-speed internal (HSI16) RC oscillator MS19215V2 VLSEH tf(LSE) 90% 10% TLSE t tr(LSE) VLSEL tw(LSEH) tw(LSEL) Table 63. Low-speed external user clock characteristics(1) – Bypass mode Symbol Parameter Conditions Min Typ Max Unit fLSE_ext User external clock source frequency - 21.2 32.768 44.4 kHz VLSEH OSC32_IN input pin high- level voltage - 0.7 x VDDx -VDDx V VLSEL OSC32_IN input pin low- level voltage -VSS - 0.3 x VDDx tw(LSEH) tw(LSEL) OSC32_IN high or low time - 250 - - ns ftolLSE Frequency tolerance Includes initial accuracy, stability over temperature, aging and frequency pulling –500 - +500 ppm 1. Guaranteed by design. Table 64. HSI16 oscillator characteristics(1) Symbol Parameter Conditions Min Typ Max Unit fHSI16 HSI16 frequency VDD = 3.0 V, TA = 30 °C 15.88 - 16.08 MHz |
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