Trenton 's BPG6741 butterfly backplane form factor designed for use in 2U chassis enclosures. Side A of this graphics-class backplane supports one PICMG 1.3 SHB, one x16 PCI Express® slot driven by a x16 PCIe link from the SHB. Side A also includes a USB Audio interface. Side B includes two x8 PCIe slots driven with x1 links from an SHB like a Trenton MCG-series.
FEATURES
• Butterfly form factor supports PCI Express® option cards
• Supports 2U chassis designs
• One SHB Express (PICMG® 1.3) Graphics-class System Host Board Slot
• One x16 PCI Express Slot (mechanical/electrical)
• Two x8 PCI Express Slots (mechanical)
• Audio port for speaker and microphone interface
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STANDARDS
PICMG 1.3 - Graphics-Class
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FORM FACTOR
2U Butterfly, one segment
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DIMENSION ENVELOPE
3.15" x 12.9"
See mechanical layout drawing for detailed dimension information.
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NUMBER OF PROCESSOR SLOTS
1 - Accepts industry standard PICMG 1.3 compatible graphics class system host boards.
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OPTION CARD SLOTS
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EXPANSION SLOT
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Suggested SHB/SBCs
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ETHERNET INTERFACES
Trenton's BPG6741 backplane supports the optional Ethernet routing feature of the SHB Express (PICMG 1.3) specification. One 10/100/1000Base-T Ethernet RJ-45 connector (P13) is available for use on the Ethernet version of the backplane. The Ethernet port is located on Side B of the backplane. This required connector location may necessitate a mechanical modification to the chassis in order to facilitate proper backplane mounting within the enclosure.
Consult your SHB’s Ethernet interface implementation method for details.
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I/O INTERFACES
Trenton's BPG6741 provides one USB 2.0 header (P11) capable of supporting two general purpose USB 2.0 backplane interface ports.
Consult your SHB’s USB interface implementation method for details.
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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 BPX6806 backplane if the +5V AUX LED is GREEN. If the system appears to be off and the +5V AUX LED is GREEN, you need to remove or turn off the incoming power to the system power supply.
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POWER CONNECTORS
The BPG6741 backplane is available with low-profile right-angle power connectors suitable for use with either an ATX or EPS* power supply.
The +12V power connectors on the BPG6741 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.
*EPS is recommended for use with Dual, high-performance processor System Host Boards.
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OPTION CARD SLOT DETAILS
PCI Express Slots – Side A
PCIe4 – x16 mechanical / x16 electrical link directly from SHB
PCI Express Slots – Side B
PCIe1 – x8 mechanical / x1 electrical link directly from MCG-series SHB
PCIe3 – x8 mechanical / x1 electrical link directly from MCG-series SHB
Trenton SHBs support the auto-negotiation and link training features that enables all of the option card slots to support x8, x4 and x1 PCI Express cards with PCIe4 also capable of supporting x16 PCI Express option cards with a x16 PCIe link.
Mechanical interferences may exist between the SHB's cooling solution and certain types of option card heat sinks used on a x16 PCI Express option card installed in backplane slot PCIe4. To ensure proper mechanical clearances regardless of option card heat sink type, Trenton recommends using either half-length or quarter-length x16 PCI Express option cards in backplane slot PCIe4. See mechanical layout for detailed slot routing information.
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MISCELLANEOUS BACKPLANE INFORMATION
USB Audio Controller
The audio controller on the BPG6741 backplane eliminates the need to dedicate an option card slot to a sound card. The USB audio controller supports a variety of speaker, headset and microphone configurations. The high-performance stereo audio ADC/DAC, general purpose I/O connections and codec functionality are key features of the BPG6741's audio controller (P30).
The USB4 port from the Trenton MCG-series SHB provides the input for the USB audio controller and the USB4 input becomes Audio0 on the BPG6741 backplane. If a Trenton T4L or TML SHB is used, then the SHBs must be factory-equipped with the optional USB routing to the backplane. Likewise non-Trenton SHBs must provide the optional USB I/O backplane routing defined in the PICMG 1.3 specification in order to enable the audio functionality of the Trenton BPG6741 backplane.
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 SHB 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 connectors on the BPG6741 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.
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