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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L431 датащи(PDF) 157 Page - STMicroelectronics |
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STM32L431 датащи(HTML) 157 Page - STMicroelectronics |
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157 / 200 page  DocID028800 Rev 1 157/200 STM32L431xx Electrical characteristics 168 6.3.25 Communication interfaces characteristics I2C interface characteristics The I2C interface meets the timings requirements of the I2C-bus specification and user manual rev. 03 for: • Standard-mode (Sm): with a bit rate up to 100 kbit/s • Fast-mode (Fm): with a bit rate up to 400 kbit/s • Fast-mode Plus (Fm+): with a bit rate up to 1 Mbit/s. The I2C timings requirements are guaranteed by design when the I2C peripheral is properly configured (refer to RM0392 reference manual). The SDA and SCL I/O requirements are met with the following restrictions: the SDA and SCL I/O pins are not “true” open-drain. When configured as open-drain, the PMOS connected between the I/O pin and VDDIOx is disabled, but is still present. Only FT_f I/O pins support Fm+ low level output current maximum requirement. Refer to Section 6.3.14: I/O port characteristics for the I2C I/Os characteristics. All I2C SDA and SCL I/Os embed an analog filter. Refer to the table below for the analog filter characteristics: Table 81. I2C analog filter characteristics(1) 1. Guaranteed by design. Symbol ParameterMin Max Unit tAF Maximum pulse width of spikes that are suppressed by the analog filter 50(2) 2. Spikes with widths below tAF(min) are filtered. 260(3) 3. Spikes with widths above tAF(max) are not filtered ns |
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