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STM32L552CCT3PTR Datasheet(PDF) 270 Page - STMicroelectronics |
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STM32L552CCT3PTR Datasheet(HTML) 270 Page - STMicroelectronics |
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270 / 340 page  Electrical characteristics STM32L552xx 270/340 DS12737 Rev 6 5.3.29 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 RM0351 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 5.3.15: I/O port characteristics for the I2C I/Os characteristics. All I2C SDA and SCL I/Os embed an analog filter. Refer to Table 128 below for the analog filter characteristics: Table 128. I2C analog filter characteristics(1) 1. Guaranteed by design. Symbol Parameter Min 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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