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STM32L162VC 数据表(PDF) 86 Page - STMicroelectronics |
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STM32L162VC 数据表(HTML) 86 Page - STMicroelectronics |
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86 / 123 page  Electrical characteristics STM32L162VC, STM32L162RC 86/123 DocID022881 Rev 10 Figure 18. I2C bus AC waveforms and measurement circuit 1. RS = series protection resistor. 2. RP = external pull-up resistor. 3. VDD_I2C is the I2C bus power supply. 4. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD. Table 49. SCL frequency (fPCLK1= 32 MHz, VDD = VDD_I2C = 3.3 V)(1)(2) 1. RP = External pull-up resistance, fSCL = I2C speed. 2. For speeds around 200 kHz, the tolerance on the achieved speed is of ±5%. For other speed ranges, the tolerance on the achieved speed is ±2%. These variations depend on the accuracy of the external components used to design the application. fSCL (kHz) I2C_CCR value RP = 4.7 kΩ 400 0x801B 300 0x8024 200 0x8035 100 0x00A0 50 0x0140 20 0x0320 |
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