Product Description
25
1.5.2 USB
The PCH contains up to 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. All ports are high-speed, full-speed, and low-speed capable.
The PCH also contains an integrated eXtensible Host Controller Interface (xHCI) host
controller which supports USB 3.0 ports. This controller allows data transfers up to
5 Gb/s. The controller supports SuperSpeed (SS), high-speed (HS), full-speed (FS),
and low-speed (LS) traffic on the bus.
The Intel Z87 Express Chipset provides the USB controller for the USB 2.0/3.0 ports.
The port arrangement is as follows:
• USB 3.0 ports:
Six ports implemented with stacked back panel connectors (blue)
Two ports implemented through one dual-port internal connectors (blue)
• USB 2.0 ports:
Two ports implemented with stacked back panel connectors (orange high
current charging ports)
Six front panel ports are implemented through three dual-port internal
connectors (two black and one orange high current charging port)
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 a 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 12, page 51
The location of the front panel USB headers Figure 13, page 52
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