| Server-Class PCI Express Backplane |
The OSS-EBP-2005 is a server-class
backplane that enables the maximum number of high-bandwidth;
i.e x4 or greater, PCI Express links from the System Host
Board to the backplane’s PCI Express option card slots
and devices. |
| PCI Express Serial Slots |
PCIE2 is a x8 PCI Express link connected to
the SHB with a x16 connector. PCIE2 mechanically supports
x16, x8, x4 and x1 PCI Express cards. PCIE1 is a x4 link
with a x8 connector and mechanically supports x8, x4 and
x1 PCI Express cards. The actual speed of a PCI Express connection
to an option card slot is determined by the SHB’s PCI
Express link configuration and the auto-negotiation/link
training features of PCI Express. |
| SHB Slot |
Accepts an SHB Express (PICMG® 1.3) compliant
(server-class) processor. |
| PCI-X Parallel Bus Slots |
The sixteen PCI-X slots are connected to the
SHB via two x4 PCI Express links that each drive a PCI Express-to-PCI-X
bridge chip. Each bridge chip provides two 64-bit/66MHz PCI-X
channels to support option card slots A1 through D4. PCI-X
and universal (i.e. 5V/3.3V combo or 3.3V only) PCI option
cards may be used and the bridge chips will throttle-down
the bus interface speeds to match any universal PCI or PCI-X
card with an interface bus speed less than 66MHz |
| Optional USB 2.0 Interfaces |
The SHB Express specification defines optional
I/O routings from the SHB to the backplane. The OSS-EBP-2005
takes advantage of this new specification feature by providing
two USB 2.0 headers capable of providing up to four USB 2.0
backplane ports. |
| Optional Ethernet Interfaces |
The OSS-EBP-2005 supports the optional Ethernet
routing feature of the SHB Express (PICMG 1.3) specification.
Two 10/100/1000Base-T Ethernet RJ-45 connectors are available
for use on the backplane. |
| Power Connectors |
The OSS-EBP-2005 is available with a low-profile,
right angle power connector suitable for use with either
an ATX or EPS power supply. |
| Extended-Current Terminal Blocks |
Three extended-current terminal blocks provide
additional power capacity for power-intensive applications
-- up to 80 Amps of +12V, 120 Amps of +3.3V and 80 Amps of
+5V. |
| Power Indicators |
Surface-mount LEDs provide a convenient visual
check for +5V, -5V, +5V AUX,+12V, -12V and +3.3V power connection
and status. CAUTION: Never install or remove the SHB or any
option card from the OSS-EBP-2005 if the +5V AUX LED is GREEN.
If the system appears to be off and the+5V AUX LED is GREEN
then you need to remove or turn-off the incoming power to
the system power supply. |
| Auxiliary Power Connector |
The +12V power connector is a right angle
connector on the OSS-EBP-2005 used for routing auxiliary
power to the SHB’s edge connectors. This new capability
of PICMG 1.3 compliant SHBs and backplanes eliminates the
need for auxiliary power connections on the system host board. |
| Printed Circuit Layers |
The backplane is a six-layer, .080” thick
board with three separate signal layers: +5V/+12V, +3.3V
and ground. Multi-layer backplane construction provides excellent
noise immunity. |
| Connecting Powers |
The combination of new power supply technologies,
soft-power control signals available via the Advanced Configuration
and Power Interface (ACPI) now supported by PICMG 1.3 SHBs
and auxiliary power connectors on PICMG 1.3 backplanes that
deliver all of the SHBs power to the edge connectors are
requiring a different approach to connecting system power. |
| |
Auxiliary power connectors on the backplane
are provided to help improve system Mean Time To Repair (MTTR).
All power can be delivered to the SHB via the board’s
edge connectors. One Stop Systems' PICMG 1.3 SHBs and backplane
SHB edge connector slots have ample power pins available
to meet the power demands of high-performance, dual processor
SHBs. The ATX/EPS and +12V power connectors on the BPX6571
backplane also have an ample number of power pins available
to meet these demands. The system designer needs to be aware
of the potential power demands of the entire system including
the particular SHB to ensure that both the power supply and
the power connectors in the cable harness can safely deliver
the necessary power to drive the entire system. |
| |
Specific implementations of ACPI signals,
ATX/EPS power supply type and the operating system software
will determine the specific connection method for the power
supply. For example the use of the Power Good (PWRGD), Power
Supply On (PSON#), Five Volt Standby (5VSB) and the Power
Button (PWRBT#) ACPI or soft power control signals require
the following connection method: |
