Product Description
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1.5.3 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 board supports up to four USB 3.0 ports and eight USB 2.0 ports.
The Intel Q77 Express Chipset provides the USB controller for the 2.0/3.0 ports. The
port arrangement is as follows:
• Two USB 3.0 ports are implemented with stacked back panel connectors (blue)
• Two front panel USB 3.0 ports are implemented through one internal connector
(blue)
• Four USB 2.0 ports are implemented with stacked back panel connectors (black)
• Four USB 2.0 front panel ports are implemented through two dual-port internal
headers
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 10, page 46
The location of the front panel USB headers Figure 11, page 47
1.5.4 SATA Interfaces
The board provides five SATA connectors, through the PCH, which support one device
each:
• Two SATA 6.0 Gb/s interfaces through the Intel Q77 Express Chipset with Intel
®
Rapid Storage Technology RAID support (blue)
• Two internal SATA 3.0 Gb/s interfaces through Intel Q77 Express Chipset with Intel
Rapid Storage Technology RAID support (black)
• One internal eSATA 3.0 Gb/s interface (red)
The PCH provides independent SATA ports with a theoretical maximum transfer rate of
6.0 Gb/s for two ports and 3.0 Gb/s for three ports. A point-to-point interface is used
for host-to-device connections.
The PCH supports the Serial ATA Specification, Revision 3.0. The PCH also supports
several optional sections of the Serial ATA II: Extensions to Serial ATA 1.0
Specification, Revision 1.0 (AHCI support is required for some elements).
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