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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STM32F769AI 데이터시트(PDF) 179 Page - STMicroelectronics |
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STM32F769AI 데이터시트(HTML) 179 Page - STMicroelectronics |
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179 / 255 page  DocID029041 Rev 4 179/255 STM32F765xx STM32F767xx STM32F768Ax STM32F769xx Electrical characteristics 224 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 VDD is disabled, but is still present. • 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 5.3.20: I/O port characteristics for the I2C I/Os characteristics. All I2C SDA and SCL I/Os embed an analog filter. Refer to Table 84 for the analog filter characteristics: Table 84. 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. 70(3) 3. Spikes with widths above tAF(max) are not filtered. ns |
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