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Explorer II
August 1, 2025
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STM32H563ZI: I3C Hot-join support with STM as I3C Controller

  • August 1, 2025
  • 1 reply
  • 313 views

Hi,

Suppose I have an I3C target endpoint sending Hot-join request after RSTDAA, is STM32H562/3ZI capable of detecting the Hot-join and pass it on to the firmware layer ? I see Hot-join request support and sample code as an I3C Target in STM32Cube repo on GitHub and generated code. How do we deal with Hot-join request as an I3C Controller

    This topic has been closed for replies.
    Best answer by QSHAO.1

    Refer to description about Bit19 HJF of I3C event register (I3C_EVR) shown below, you are allowed to identify Hot-join as I3C controller by checking this bit in your FW. thanks! 

    QSHAO1_0-1754557245352.png

     

    1 reply

    QSHAO.1Answer
    ST Employee
    August 7, 2025

    Refer to description about Bit19 HJF of I3C event register (I3C_EVR) shown below, you are allowed to identify Hot-join as I3C controller by checking this bit in your FW. thanks! 

    QSHAO1_0-1754557245352.png