Yes. The I3C Master must emit the first START, 7’h7E at Open-Drain speeds (usually I2C Fm+ speeds) so that I3C Slaves with I2C Spike Filters will be able to see the I3C Broadcast Address, and then as a result turn off the Spike Filter. If the Master knows that none of the I3C Slaves has a Spike Filter, then it may omit this. Similarly, if the Master knows that all of the I3C Slaves have accurate Spike Filters, then it may use the I3C 2.5 MHz open-drain speed (i.e., 200 ns Low, 200 ns High).

FAQ Type: 
I3C