PC4-PRESTO • CompactPCI
®
PlusIO • 4
th
Generation Intel
®
Core™-4xxx Processor
Utility Interfaces
Besides the high speed mezzanine interface connectors P-HSE and P-PCIE, the PC4-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
2
C address conflict.
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 PC4-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.
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