1. Compliant with Universal Serial Bus 3.0 specification Revision 1.0                                                                                                                                                                                            2.Low-speed (1.5 Mbps) / Full-speed (12 Mbps) / High-speed (480 Mbps) / Super-speed (5 Gbps)                                                                                                                                                                                             3.Supports 2 downstream ports for all speeds                                                                                                           4.Supports all USB compliant data transfer type as follows: Control / Bulk / Interrupt / Isochronous transfer                                                                                                                                                                              5.Compliant with Intel's eXtensible Host Controller Interface (xHCI) Specification revision 0.95                                                                                                                                                                                          6.Support USB legacy function                                                                                                                                 7.Operational registers are direct-apped to PCI memory space                                                                                8.Supports Serial Peripheral Interface (SPI) type ROM                                                                                                                                                                               9.System clock: 24 MHz crystal or 48MHz external clock.                                                                                       10.3.3 V and 1.05 V power supply