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ADE7978 数据表(PDF) 10 Page - Analog Devices |
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ADE7978 数据表(HTML) 10 Page - Analog Devices |
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10 / 120 page  ADE7978/ADE7933/ADE7932 Data Sheet Rev. 0 | Page 10 of 120 I2C Interface Timing Parameters VDD = 3.3 V ± 10%, GND = DGND = 0 V, XTALIN = 16.384 MHz, TMIN to TMAX = −40°C to +85°C. Table 3. Standard Mode Fast Mode Parameter Symbol Min Max Min Max Unit SCL Clock Frequency fSCL 0 100 0 400 kHz Hold Time for Start and Repeated Start Conditions tHD;STA 4.0 0.6 μs Low Period of SCL Clock tLOW 4.7 1.3 µs High Period of SCL Clock tHIGH 4.0 0.6 µs Set-Up Time for Repeated Start Condition tSU;STA 4.7 0.6 µs Data Hold Time tHD;DAT 0 3.45 0 0.9 µs Data Setup Time tSU;DAT 250 100 ns Rise Time of SDA and SCL Signals tR 1000 20 300 ns Fall Time of SDA and SCL Signals tF 300 20 300 ns Setup Time for Stop Condition tSU;STO 4.0 0.6 µs Bus Free Time Between a Stop and Start Condition tBUF 4.7 1.3 µs Pulse Width of Suppressed Spikes tSP N/A1 50 ns 1 N/A means not applicable. tF tR tHD;DAT tHD;STA tHIGH tSU;STA tSU;DAT tF tHD;STA tSP tSU;STO tr tBUF tLOW SDA SCL START CONDITION REPEATED START CONDITION STOP CONDITION START CONDITION Figure 5. I2C Interface Timing |
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