Intel S875WP1-E manual High-Speed USB 2.0 Support, Legacy USB Support

USB

High-Speed USB 2.0 Support

✏NOTES

Use a shielded cable that meets the requirements for a full-speed USB device. Computer systems that have an unshielded cable attached to a USB port might not meet FCC Class B requirements, even if no device or a low- speed USB device is attached to the cable.

USB devices are limited to USB 1.1 transfer rates prior to operating system and driver initialization.

The server board supports up to six USB 2.0 ports via the ICH5. Four ports are routed to the back panel. One header, supporting up to two ports, is routed to the front panel. USB 2.0 ports are backward compatible with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds.

USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer rates. Disabling High-Speed USB in BIOS reverts all USB 2.0 ports to USB 1.1 operation. This may be required to accommodate operating systems that do not support USB 2.0.

Legacy USB Support

Legacy USB support allows USB devices such as keyboard, mice, and hubs to be used even when the operating system’s USB drivers are not available. Legacy USB support is used to access the BIOS Setup program, and to install an operating system that supports USB. By default, Legacy USB support is set to Enabled.

Four of the USB ports are implemented with stacked back panel connectors; the other two are accessible via the front panel USB header. The S875WP1-E server board fully supports UHCI and uses UHCI-compatible software drivers.

✏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 s shielded cable that meets the requirements for full-speed devices.

Server Board Features 19