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DS90UB913A-Q1: DS90UB913 I2C read and write

Raymond He
Expert 1990 points
Part Number: DS90UB913A-Q1

dear

     the I2C communication between DS90UB913 and DS90UB914 cannot be established through COAX, but the image signal can be transmitted normally.

Here's an example:

Try to read and write the 0x01 register of DS90UB913 encoder through the I2C on DS90UB914 encoder, but the read and write operation failed, the same with other registers.

and advice？thanks in advance

  • 0
    TI__Mastermind 18755 points

    Hello,

    Are you able to communicate with the 914 at least?  It sounds like either the addressing is incorrect or the backchannel setup isn't right.  Can you provide the values of any backchannel config registers and I2C config registers from the 914?  Such as:

    0x03

    0x1C

    0x21

    0x22

    0x4C

    Also can you verify that you are writing to the serializer alias address and not the actual serializer address?  This alias is found in register 0x07.

    Regards,

    Nick