Technical information

Technical Information • SCS-TRUMPET • CPU Expansion Side Card
Theory of Operation
The SCS-TRUMPET fits on the top side of the
CPU board, (the right side when viewing the
common front panel). The side board
communicates by means of four bottom mount
expansion connectors with the host CPU: PCIE
(PCI Express x 4), HSE (High Speed Expansion
meaning SATA and USB), DP (DisplayPort), and
EXP (multi-function legacy I/F such as LPC).
Suitable CPU carrier cards e.g. are the
SC1-ALLEGRO, SC2-PRESTO, or SC3-LARGO
(CompactPCI® Serial).
The PCI Express interface mezzanine connector
PCIE is comprised of 4 PCIe lanes. The CPU
carrier must be configured for 4 links x 1 (by
CPU card DIP-switch settings, consult CPU user
guide). On the SCS-TRUMPET, two PE lanes are
dedicated to two USB 3.0 host controllers. The
other two lanes are in use for two on-board
SATA 6G host controllers. Up to eight USB 3.0
SuperSpeed ports are available from the USB
controllers (two front panel jacks, and as an
option six rear I/O channels across P3). The
optional on-board SATA controllers provide two
channels each, for a total of up to four SATA
ports wired to the rear I/O connector P3. If rear
I/O is not required for the SCS-TRUMPET, the
SATA 6G controllers would be entirely omitted,
and a different USB 3.0 controller would be
stuffed which provides only two ports, wired to
the stacked USB 3.0 front panel jacks.
The DP mezzanine connector is provided for
applications with need for a third DisplayPort
front panel video connector, in addition to the
dual-video outputs provided by the CPU carrier
card. It is connected to a front panel receptacle.
The HSE mezzanine connector passes a
maximum of 4 x SATA channels and 4 x USB
2.0 ports from the host CPU to the
SCS-TRUMPET side board. All on-board mass
storage solutions, the 2.5-inch SATA drive
and/or two M.2 SSD modules are tied directly
to the HSE mezzanine connector. The USB 2.0
ports are in use for optional F/P I/O. If available,
the 4
th
SATA channel is wired for rear I/O across
a redriver (P3 option).
The mezzanine connector EXP combines several
side-band data channels: The HD Audio
interface (aka Azalia) is a data path to the on-
board audio codec. The LPC (Low Pin Count)
enables the super-I/O (SIO) controller chip to
emulate the legacy I/O interfaces; among these
are the classic serial (COM) and PS/2
keyboard/mouse ports.
The SCS-TRUMPET can also be used with
CompactPCI® PlusIO CPU cards such as the
PC3-ALLEGRO or PC4-PRESTO. Other CPU cards
may not support all functionality available on
the PCS-BALLET, e.g. the DisplayPort.
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