FEATURES

• Small (shoebox) form factor for compact system designs
• One PICMG 1.3 graphics-class SHB slot
• One x16 PCI Express® mechanical slots
• Two x8 PCI Express® mechanical slots

STANDARDS

PICMG 1.3 - Graphics Class

FORM FACTOR

Small form factor, one segment

DIMENSION ENVELOPE

5.25¡± x 11.9¡±

See mechanical layout for detailed dimension information.

NUMBER OF PROCESSOR SLOTS

1- Accepts industry standard PICMG 1.3 compatible graphics-class system host boards.

OPTION CARD SLOTS

3

EXPANSION SLOT

Yes, provides a PCIe link that drives backplane slot PCIe1 via a Trenton IOB31 connected to the SHB.

Suggested SHB/SBCs

TQ9
TML
T4L
MCGT
MCGT-E
MCGI

ETHERNET INTERFACES

Trenton's BPG4 backplane supports the optional Ethernet routing feature of the SHB Express (PICMG 1.3) specification. Two 10/100/1000Base-T Ethernet RJ-45 connectors (P13 and P14) are available for use on the backplane. Data communication performance of the backplane's Ethernet interfaces depends on the Ethernet controller hardware and configuration on the system host board.

Consult your SHB¡¯s Ethernet interface implementation method for details.

I/O INTERFACES

Trenton¡¯s BPG4 supports two USB 2.0 headers  (P11 & P12) capable of providing up to four USB 2.0 backplane interfaces.

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 any backplane segment if the +5V AUX LED for the segment is GREEN. If the system appears to be off and the +5V AUX LEDs are GREEN, you need to remove or turn off the incoming power to the system power supply.

POWER CONNECTORS

The standard BPG4 backplane is available with low-profile right angle power connector suitable for use with either an ATX or EPS power supply. An optional BPG4 is available with straight-in or vertical power connectors. Using straight-in power connectors may interfere with a full-length option card placed in the PCIE3 slot.

The +12V right-angle power connectors on the BPG4 route 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.  A vertical +12V AUX connector option is available.

OPTION CARD SLOT DETAILS

PCI Express Slots
PCIe1 ¨C x8 mechanical /x4 or x1 electrical link from SHB via IOB31
PCIe2 ¨C x8 mechanical /x4 electrical link directly from SHB
PCIe3 ¨C x16 mechanical /x16 electrical link directly from SHB

Note:  An MCG-series SHB provides a x4 PCIe link to slot PCIe1 and a TQ9, TML or T4L provides a x1 link

See mechanical layout for detailed slot routing information.

MISCELLANEOUS BACKPLANE INFORMATION

Connecting Power
A new approach is required to connect system power due to the combination of new power supply technologies and the soft-power control signals available via the Advanced Configuration and Power Interface (ACPI). ACPI signals are now supported by PICMG 1.3 SHBs and backplanes. Auxiliary power connectors located on the PICMG 1.3 backplanes now deliver all of the power directly to the edge connectors of the SHB.

Auxiliary power connectors on the backplane are provided to help improve system Mean Time To Repair (MTTR). All power can be delivered to the SHBs via the board's edge connectors. Trenton's 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 connector on the BPG4 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:

ACPI signal usage is optional and may be turned off using the SHBs BIOS and/or signal jumpers. Specific power connections and BIOS parameters will differ depending on unique system design requirements. Refer to the Appendix B (Power Connection) and Advanced Setup BIOS sections found in the Technical Reference Manual for your specific Trenton system host board for more information.