Trenton NTM6900, Техническое описание

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PCI Express Reference NTM6900 / WTM7026 Technical Reference
Motherboard PCIe Card Slot Configurations
The motherboard supports PCI Express option cards with either PCIe revision 1.0 or 2.0 interfaces. The
mechanical slots and their associated PCIe electrical link configurations enable the motherboard to support
PCI Express option cards that implement industry standard x16, x8, x4 and x1 PCIe electrical links. Like
the PCI Express interface implementation on the motherboard, the PCIe option cards must also support the
PCI Express auto-negotiation or link training feature specified in the PCI Express interface specification.
Link training enables a PCIe option card with a x16 electrical link to function in motherboard slot PCIe5.
The interface controller inside the motherboard’s Intel 5520 IOH will auto-negotiate with the option card’s
PCIe controller to establish communications at the lowest common link, which in this example would be
the x8 PCIe electrical link. This same capability exists on all of the motherboard’s PCIe option card slots.
Option cards with PCI Express 2.0 interface implementations should be installed in motherboard slots
PCIe1, PCIe3, PCIe4, PCIe5 or PCIe6 to take full advantage of the speed benefits of the PCIe 2.0 interface.
A PCIe 2.0 card installed in PCIe2 slot will function, but will operate at the PCIe 1.1 interface data rate.
The table below will help explain the motherboard’s PCIe slot configurations:
PCIe Card Slot Mechanical Size Electrical Link PCIe Interface Implementation Supported
PCIe1 x16 x8 PCIe 2.0 or PCIe 1.1
PCIe2 x8 x4 PCIe 1.1
PCIe3 x16 x8 PCIe 2.0 or PCIe 1.1
PCIe4 x8 x4 PCIe 2.0 or PCIe 1.1
PCIe5 x16 x8 PCIe 2.0 or PCIe 1.1
PCIe6 x8 x4 PCIe 2.0 or PCIe 1.1
Motherboard PCI Card Slot Configuration
The slot labeled PCI-1 is a 32-bit/33MHz PCI slot. Unlike PCI Express the PCI slot is driven with a
parallel bus. However, unlike many passive PCI backplane designs there are no additional devices attached
to this particular bus to slow down PCI option card communications to the motherboard’s I/O controller
hub. The PCI-1 slot supports either 5V or universal 32-bit/33MHz PCI option cards.
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