All I3C devices must be able to process broadcast CCCs at any time, whether or not they have been assigned a dynamic address (DA). For example, an I3C device may act as an I²C device before it gets its DA assigned. However, it is expected to ACK the START with 7’h7E; the only exception would be if this device choosing to remain only as an I²C device, in which case, it would leave any 50ns spike filter enabled. For those devices that do recognize START and address 7’h7E, those may see any CCC and not just ENTDAA (Enter DA Assignment) or SETDASA (Set Dynamic Address from Static Address). See the I3C Specification for the required CCCs. The device can determine the effect of each CCC based on whether or not it has the DA assigned (e.g., the RSTDAA CCC [Reset DA Address] will probably have no effect before the DA has been assigned).

FAQ Type: 
I3C