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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F101X6 датащи(PDF) 54 Page - STMicroelectronics |
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STM32F101X6 датащи(HTML) 54 Page - STMicroelectronics |
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54 / 74 page  Electrical characteristics STM32F101xx 54/74 Figure 23. I2C bus AC waveforms and measurement circuit(1) 1. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD. Table 39. SCL frequency (fPCLK1= 36 MHz, VDD = 3.3 V) (1)(2)(3) 1. TBD = to be determined. 2. RP = External pull-up resistance, fSCL = I 2C speed, 3. For speeds around 200 kHz, the tolerance on the achieved speed is of ±5%. For other speed ranges, the tolerance on the achieved speed ±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 TBD 300 TBD 200 TBD 100 TBD 50 TBD 20 TBD ai14127b START SDA 100 Ω 4.7k Ω I²C bus 4.7k Ω 100 Ω VDD VDD STM32F101 SDA SCL tf(SDA) tr(SDA) SCL th(STA) tw(SCKH) tw(SCKL) tsu(SDA) tr(SCK) tf(SCK) th(SDA) S TART REPEATED START tsu(STA) tsu(STO) S TOP tsu(STA:STO) |
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