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ADUCM322I Datasheet(PDF) 8 Page - Analog Devices |
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ADUCM322I Datasheet(HTML) 8 Page - Analog Devices |
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8 / 23 page  ADuCM322i Data Sheet Rev. 0 | Page 8 of 23 TIMING SPECIFICATIONS I2C Timing Table 2. I2C Timing in Standard Mode (100 kHz) Slave Parameter Description Min Typ Max Unit tL SCL low pulse width 4.7 μs tH SCL high pulse width 4.0 ns tSHD Start condition hold time 4.0 μs tDSU Data setup time 250 ns tDHD Data hold time (SDA held internally for 300 ns after falling edge of SCL) 0 3.45 μs tRSU Setup time for repeated start 4.7 μs tPSU Stop condition setup time 4.0 μs tBUF Bus-free time between a stop condition and a start condition 4.7 μs tR Rise time for both SLC and SDA 1 μs tF Fall time for both SLC and SDA 15 300 ns tVD;DAT Data valid time 3.45 μs tVD;ACK Data valid acknowledge time 3.45 μs Table 3. I2C Timing in Fast Mode (400 kHz) Slave Parameter Description Min Typ Max Unit tL SCL low pulse width 1.3 μs tH SCL high pulse width 0.6 ns tSHD Start condition hold time 0.3 μs tDSU Data setup time 100 ns tDHD Data hold time (SDA held internally for 300 ns after falling edge of SCL) 0 μs tRSU Setup time for repeated start 0.6 μs tPSU Stop condition setup time 0.3 μs tBUF Bus-free time between a stop condition and a start condition 1.3 μs tR Rise time for both SCL and SDA 20 300 ns tF Fall time for both SCL and SDA 15 300 ns tVD;DAT Data valid time 0.9 μs tVD;ACK Data valid acknowledge time 0.9 μs Figure 2. I2C Compatible Interface Timing SDA (I/O) MSB LSB ACK MSB 1 9 8 2–7 1 SCL (I) PS START CONDITION REPEATED START STOP CONDITION S(R) tDSU tH tL tSHD tPSU tDSU tBUF tDHD tVD; DAT tVD; ACK tR tF tF tR tDHD tRSU |
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