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STM32F756VG 数据表(PDF) 156 Page - STMicroelectronics |
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STM32F756VG 数据表(HTML) 156 Page - STMicroelectronics |
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156 / 228 page  Electrical characteristics STM32F756xx 156/228 DocID027589 Rev 4 The 20mA output drive requirement in Fast-mode Plus is not supported. This limits the maximum load Cload supported in Fm+, which is given by these formulas: • Tr(SDA/SCL)=0.8473xRpxCload • Rp(min)= (VDD-VOL(max))/IOL(max) Where Rp is the I2C lines pull-up. Refer to Section 5.3.17: 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 75. I2C analog filter characteristics(1) 1. Guaranteed by characterization results. 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. 150(3) 3. Spikes with widths above tAF(max) are not filtered ns |
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