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TUSB3200 数据表(PDF) 46 Page - Texas Instruments |
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TUSB3200 数据表(HTML) 46 Page - Texas Instruments |
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46 / 93 page  3–6 3.4.6 I2C Interface Signals Over Recommended Operating Conditions (unless otherwise noted) PARAMETER TEST CONDITIONS STANDARD MODE FAST MODE UNITS MIN MAX MIN MAX fSCL Frequency, SCL 0 100 0 400 kHz tw(H) Pulse duration, SCL high 4 0.6 µs tw(L) Pulse duration, SCL low 4.7 1.3 µs tr Rise time, SCL and SDA 1000 300 ns tf Fall time, SCL and SDA 300 300 ns tsu1 Setup time, SDA to SCL 250 100 ns th1 Hold time, SCL to SDA 0 0 ns tbuf Bus free time between stop and start condition 4.7 1.3 µs tsu2 Setup time, SCL to start condition 4.7 0.6 µs th2 Hold time, start condition to SCL 4 0.6 µs tsu3 Setup time, SCL to stop condition 4 0.6 µs CL Load capacitance for each bus line 400 400 pF tw(H) tw(L) tr tf tsu1 th1 SCL SDA Figure 3–7. SCL and SDA Timing Waveforms tsu2 th2 tsu3 tbuf SCL SDA Start Condition Stop Condition Figure 3–8. Start and Stop Conditions Timing Waveforms 12 8 9 SCL SDA OUT SDA IN Figure 3–9. Acknowledge Timing Waveform |
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