Universal Serial Bus (Usb); Utility Interfaces - EKF SC2-PRESTO CompactPCI User Manual

User Guide • SC2-PRESTO • CompactPCI

Universal Serial Bus (USB)

The SC2-PRESTO is provided with fourteen USB ports. All of them are USB 2.0 capable, but four ports
are also supporting the USB 3.0 SuperSpeed standard. Two USB 3.0 interfaces are routed to front
panel connectors, the other two SuperSpeed ports are feed to the CompactPCI
and P3.
The USB 2.0 interfaces are distributed to the front panel (two ports), two to the expansion board
interface connectors P-EXP, four to the high speed expansion connector P-HSE, and six ports are
available across the backplane connectors for CompactPCI
The front panel USB connectors can source a minimum of 1.5A/5V each, over-current protected by
two electronic switches. Protection for the USB ports on the expansion interfaces and on the
®
CompactPCI Serial connectors is located on expansion boards and the boards on the CompactPCI
Serial backplane respective. The USB xHCI and two EHCI controllers handling the USB port operation
at SuperSpeed, high-speed, full-speed and low-speed are integrated into the QM87 PCH.
An xHCI driver (USB 3.0) for Windows® 7 is provided by Intel and can be downloaded from EKF's
website.

Utility Interfaces

Besides the high speed mezzanine interface connectors P-HSE and P-PCIE, the SC2-PRESTO is provided
with the utility interface expansion connector socket P-EXP. This connector comprises several
interfaces, which may be useful for system expansion on mezzanine cards, as an option:
HD Audio
<
LPC (Low Pin Count)
<
SMBus
<
2 x USB
<
The SMBus is controlled by the QM87 platform controller hub. The SMBus signal lines on the P-EXP
utility expansion connector can be switched on/off under software control (PCH GPIO) in order to
isolate external components in case of an I
The HD Audio port requires an additional audio codec, as provided e.g. on the PCS-BALLET side card.
The LPC bus presents an easy way to add legacy interfaces to the system. EKF offers a variety of
mezzanine expansion boards (side cards), to be attached on top of the SC2-PRESTO, featuring all
classic Super-I/O functionality, for example the PCS-BALLET. Access to the connectors PS/2 (mouse,
keyboard), COM, USB and audio in/out is given directly from the front panel.
© EKF
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