It supports two modes of operation: - USB host mode and OTG mode, selectable by device mode select pin. - USB host mode supports four USB2.0 host ports and four USB host controllers. - OTG mode supports two USB2.0 host ports, one USB OTG port, and provides the function of selecting GPIO or ISA interface. Four USB2.0 host ports are integrated with on-chip ceivers and support four Enhanced Host Controller Interfaces (EHCI) and four Open Host Controller Interfaces (OHCI). USB OTG port is integrated with OTG PHY and supports host and device operation.Temporary ISA interface supports up to four serial ports and/or up to two parallel ports. Temporary 24 GPIO pins can be programmed as input or output. PCI Express, Single- (x1) PCI Express endpoint controller with integrated PHY, Compliant with PCI Express Base Specification Revision 1.1, Compliant with PCI Express card specification, Supports multiple DMA actions, Supports eight PCI Express functions, Support message TLP (error) generation, Support legacy and interrupt mechanism, Support PCIe power management with ASPM support<br><br>USB function Four USB 2.0 host ports with on-chip ceivers, Can handle high speed (480Mbps), (12Mbps) and low speed (1.5Mbps) rates USB 2.0 host port can support OTG function Four Enhanced Host Controller Interface (EHCI) controllers Four companion Open Host Controller Interface (OHCI) controllers Compatible with batch, interrupt and isochronous USB devices, multiple high-performance USB devices run simultaneously, support USB power management As a peripheral, OTG supports High Speed ()/ () operation As a peripheral, OTG supports the following endpoints: 1 control endpoint 1 interrupt IN endpoint 2 Bulk IN endpoints 2 Bulk OUT endpoints Supports hot plug function allowing you to connect/disconnect devices without shutting down the system first System Requirements ® 2000, XP/2003/