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ADS7830: I2C timeout issue of ADS7830

Part Number: ADS7830

power on our system board and master(BMC) wonder to communicate with ADS7830IPWR and found the data bus keep L, the timeout timer of our BMC is about 300ms, so BMC abort this enquire, we wonder what kind of situation will cause this symptom.(chance is quick low and so far we found this symptom happens in early DC on)

  • Hello,

    This is odd behavior, and not expected.

    What do you mean exactly by it happens in early DC?

    To make sure I understand, the master times out after waiting for an acknowledge from the device, but never receives one, is this correct?

    The first thing to clarify is if there is a pattern or specific circumstance that this is seen. I am assuming that there are times that the device communicates correctly, and then there at times that it does not? Please double check and this and share the circumstances.

    Second is to make sure that there is nothing else on the bus that might be holding the low and disrupting communications

    Regards

    Cynthia