Intel Desktop Board DP55WB Technical Product Specification

1.6 Intel

P55 Express Chipset

Intel P55 Express Chipset with Direct Media Interface (DMI) interconnect provides

interfaces to the processor and the USB, SATA, LPC, LAN, PCI, PCIe interfaces. The

Intel P55 Express Chipset is a centralized controller for the board’s I/O paths.

For information about Refer to

The Intel P55 chipset http://www.intel.com/products/desktop/chipsets/index.htm

Resources used by the chipset Chapter 2

1.6.1 USB

The board supports up to 14 USB 2.0 ports, via two Enhanced Host Controller

Interface (EHCI) host controllers that support USB high-speed signaling. High-speed

USB 2.0 allows data transfers up to 480 Mb/s which is 40 times faster than full-speed

USB.

The Intel P55 Express Chipset provides the USB controller for all ports. The port

arrangement is as follows:

• Eight ports are implemented with stacked back panel connectors

• Six front panel ports implemented through three internal headers

All 14 USB ports are high-speed, full-speed, and low-speed capable.

NOTES

One of the front panel USB headers supports an Intel Z-U130 USB Solid-State Drive

(or compatible device).

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.

For information about Refer to

The location of the USB connectors on the back panel Figure 9, page 38

The location of the front panel USB headers Figure 10, page 39