1.7 Private I3C Transaction

The controller can begin a Private I3C Transaction with the Target by addressing it directly using the Dynamic Address after a Start/Restart, or after transmitting the 7’h7E/W I3C Broadcast Address. When a Dynamic Address match occurs, the DADRIF bit is set, and the RNW bits are changed to reflect whether the transaction is a read or a write request from the controller.

When a Dynamic Address match occurs, the module responds with an ACK/NACK as described below.

• If ACKP = 0, then the module typically ACKs the request as follows:
  • Private Write: Module always ACKs regardless of the status of the Receive FIFO
  • Private Read: Module ACKs only when data is available in Transmit FIFO
• If ACKP = 1, then the module typically NACKs the request, except when ACKPOS changes this behavior, as mentioned below
• If ACKPOS = 1, the following immediate Private Transaction request will be ACK'd regardless of the status of the ACKP bit