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UCD3138128: I3C interface communication on UCD3138128

Johnny Chen
Expert 3790 points
Part Number: UCD3138128
Other Parts Discussed in Thread: UCD3138

Hi Champ, 

I am asking for my customer.

They are trying to use the I3C module to communicate with the device (UCD3138128) on their PSU, and there is a communication issue on it.

For UCD series, will it support I3C in the future ?

If yes, is there any app. note for UCD series that talks about I3C circuit and usage method that could be shared ?

Thanks and regards.

  • +1
    TI__Genius 17090 points

    The UCD family only supports I3C. There are two identical interfaces that support both PMBus and I2C. They are documented in the ucd3138 technical reference manual. There is an I2C mode bit, but it only affects controller mode (formerly known as master mode). 

  • 0 in reply to Ian Bower
    TI__Genius 17090 points

    I edit the first post to put in more info, but I noticed that it didn't get resent, so I decided to hit it again.  I added descriptions of the I2C interface which the UCD does have, and information on where to find more info.