Yes, several fixes to the MIPI I3C v1.1.1 and I3C Basic v1.1.1 specifications have been identified. MIPI is currently working to publish these as Errata. These fixes all fall into the category of clarifying requirements for Passive Hot-Join.

A key technical detail was omitted in I3C v1.1.1 and I3C Basic v1.1.1: a passive Hot-Joining Target needs to see an SDR Frame that is addressed to the Broadcast Address (i.e., 7’h7E / W) in order to determine that it is indeed on an I3C Bus (see Q17.7). Additionally, once it sees this SDR Frame, a passive Hot-Joining Target may either (a) pull SDA Low to raise its own Hot-Join Request, or (b) wait for another I3C Device to pull SDA Low and then arbitrate the Hot-Join Address (i.e., 7’h02) into the Arbitrable Address Header.

Note: The I3C v1.1 specification did note the correct requirement for the Broadcast Address.

FAQ Category:

FAQ Type: 
I3C