Usb; Usb Port Configuration - Intel D845GEBV2 - OCTOBRE 2002 Manual

1.8.2 USB

The Desktop Boards support up to six USB 2.0 ports and fully support UHCI and EHCI and use
UHCI- and EHCI-compatible drivers. For more than six USB devices, an external hub can be
connected to any of the ports.
The ICH4 provides the USB controller for all ports, as shown in Figure 7. The port arrangement is
as follows:
•
Two ports are implemented with stacked back panel connectors, adjacent to the PS/2
connectors
•
Two ports are implemented with stacked back panel connectors, adjacent to the audio
connectors
•
Two ports are routed to the front panel USB connector
82801DB
I/O Controller Hub
(ICH4)
✏
NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the
requirements for full-speed devices.
✏
NOTE
USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not currently
supported by any other operating system.
For information about
The location of the USB connectors on the back panel
The location of the front panel USB connector
The EHCI, front panel, UHCI, and USB specifications
USB USB ports (2)
USB USB ports (2)
USB USB ports (2)
Figure 7. USB Port Configuration
Product Description
Back panel USB connectors
adjacent to the PS/2 ports
Back panel USB connectors
adjacent to the audio connectors
Front panel USB connectors
OM14260
Refer to
Figure 12, page 60
Figure 17, page 69
Section 1.5, page 20
33