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LP5009: I2C communication, delay after EN

Nicholas Carley
Genius 10245 points
Part Number: LP5009


I have a question about the lp5009 and timing with it's I2C bus. In the datasheet, section 7.6, there is a parameter called EN first rising edge until first I2C access. My understanding is that this is the time between bringing the EN line high and when we can first send I2C commands/data to the lp5009. Reading the value then it seems like this would require waiting at most 500us after bringing the EN line high to send any I2C commands/data. My question is that the correct interpretation of this parameter? Is there an issue with waiting longer than 500us before sending our first I2C transaction?

  • +1
    TI__Expert 4160 points

    Hi Nicholas,

    The 500μs is the maximum time span from EN first rising edge to first I2C access reserved for the internal digital logic. It means that a waiting time longer than 500μs is preferred to avoid any issues on I2C communication. 

    Best Regards,

    Aaron Bing