•When the device is detached from a root hub port, the PORTSC current connection status (CCS) bit is cleared to 0 and the connect status change (CSC) bit is set to 1.
•If a 0 to 1 transition of PSCEG occurs, the xHCI reports the change through a port status change event.
•After the detection of detach, system software disables the device slot associated with the port by issuing a disable slot command for the affected slot.