USB 2.0 Adapter Card 4 port PCI
4-Port PCI host controller comes with 5 connectors, 4 external
and 1 internal connectors; one of the external is sharing the same port with the
USB 2.0 Adapter NEC’s USB 2.0 host controller, which was the first to
receive USB certification last November. The NEC’s host controller chip provides
4 ports in a three (3) independent host controller design (two OHCI & one EHCI).
With this specification, all 4 ports support both the OHCI and EHCI. Users may
connect any USB 2.0 and 1.1 devices to any of these 4 ports, and enjoy the full
bandwidth of USB 2.0 and USB 1.1.
USB 2.0, or Enhanced Host Controller Interface (EHCI) has a total
bandwidth of 480 Mbits/sec, which can deliver 40 times faster speed than the
older USB 1.1 specification, or Open Host Controller Interface (OHCI, 12 Mbits/sec