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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L081CB датащи(PDF) 89 Page - STMicroelectronics |
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STM32L081CB датащи(HTML) 89 Page - STMicroelectronics |
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89 / 110 page  DocID027513 Rev 4 89/110 STM32L081xx Electrical characteristics 95 The analog spike filter is compliant with I2C timings requirements only for the following voltage ranges: Fast mode Plus: 2.7 V VDD 3.6 V and voltage scaling Range 1 Fast mode: –2 V VDD 3.6 V and voltage scaling Range 1 or Range 2. –VDD < 2 V, voltage scaling Range 1 or Range 2, Cload < 200 pF. In other ranges, the analog filter should be disabled. The digital filter can be used instead. Note: In Standard mode, no spike filter is required. USART/LPUART characteristics The parameters given in the following table are guaranteed by design. Table 65. I2C analog filter characteristics(1) 1. Guaranteed by characterization results. Symbol Parameter Conditions Min Max Unit tAF Maximum pulse width of spikes that are suppressed by the analog filter Range 1 50(2) 2. Spikes with widths below tAF(min) are filtered. 100(3) 3. Spikes with widths above tAF(max) are not filtered ns Range 2 - Range 3 - Table 66. USART/LPUART characteristics Symbol Parameter Conditions Typ Max Unit tWUUSART Wakeup time needed to calculate the maximum USART/LPUART baudrate allowing to wake up from Stop mode Stop mode with main regulator in Run mode, Range 2 or 3 -8.7 µs Stop mode with main regulator in Run mode, Range 1 -8.1 Stop mode with main regulator in low-power mode, Range 2 or 3 -12 Stop mode with main regulator in low-power mode, Range 1 -11.4 |
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