1.1 Module Clock Selection

The I3C module requires a clock source for its internal state machine operation, which is selected using the I3CxCLK register. The user should choose a clock fast enough to keep up with the transactions on the bus for the desired packet length. In general, it is not recommended to operate the I3C module at a clock slower than the SCL bus frequency when the packet size is longer than the FIFO size. Doing so may result in transmission errors.

In addition, the I3C module clock also acts as a clock base for determining the bus idle, bus available, and bus timeout conditions on the bus.