JAJSQ90 september 2020 TSB41BA3F-EP
PRODUCTION DATA
When a port is in the P2:Active state if the invalidCount exceeds the value of 0x3 the port has lost synchronization and it shall exit the P2:Active state. The intent of the value of 0x3 is unclear but it is thought that a higher value may increase the invalid signal tolerance and may reduce the number of disconnects due to loss of synchronization. With the Fast Retrain feature, the value in making the invalidCount programmable has diminished. A programmable invalidCount register has been created with a default of 0x3 when this enhancement is disabled, and 0xB when this enhancement is enabled. See for details.