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DS90UB953A-Q1:The DS90UB953 backward immunity improve issue

Part Number: DS90UB953A-Q1

We use I2C backward channel for control ISP function by DS90UB953 components, and sometimes the I2C control doesn't stable

Is it has any function for improve the immunity by I2C control stauts?  

PS!  The below diagram is the backward I2C improve of MAXIM 96705 for reference.        

  • Hello Tiki,

    I am not sure I fully understood your question! What do you mean by I2C backward channel?

    Can you share a simple block diagram and explain what are you trying to do and what is failing exactly?

    Can you explain the failure?

  • Hello Jardat: The I2C backward channel means the reverse control channel(the below meaning is define by Maxim) So I want check the serializer 953 has some improve the immunity for reverse control channel or not 

    Reverse Control ChannelControl data sent from the deserializer to the serializer is sent on the reverse control channel. The data is encoded as a series of 1μs pulses, with a maximum raw data rate of 1Mbps. High-immunity mode is available to increase the robustness of the reverse control channel at a reduced raw bit rate of 500kbps. In Table 1, setting the REV_FAST bit = 1 increases this rate back to 1Mbps. In I2C mode, when the input data rate (after encoding) exceeds the reverse data rate, the input clock is held through clock stretching to slow the external clock to match the internal bit rate

  • Tiki,

    We do have some advanced features which can be enabled to add additional error checks and corrections to the BCC I2C communication, however usually these are not needed with proper system design in order to reach error free communication. Can you please give us a more detailed level idea of what exact issue you are seeing with the I2C communication first? The fix to that may actually be to correct something in the system design first 

    Best Regards,

    Casey