JAJSQ90 september 2020 TSB41BA3F-EP
PRODUCTION DATA
Fast-Retrain maintains backward compatibility with IEEE-1394-2008 and IEEE-1394b-2002 implementations. In the case of a temporary loss of signal, when a non-Fast-Retrain PHY port exits the P2:Active state because of a loss of synchronization it will transition through the P3:Suspend Initiator and P5:Suspended states to P0:Disconnected. The Fast-Retrain port will fail to retrain and will transition to P12:Loop Disabled state from the P11:Untested state. However, as the non-Fast-Retrain port doesn’t transmit a tone for approximately 84 milliseconds after the loss of synchronization, the Fast-Retrain port will not detect a connection and will then transition to the P0:Disconnected state. In the case of physical disconnect the Fast-Retrain port will end up in the P0:Disconnected state waiting for a new connection.