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Fuctional Architecture
3.1.4
Snoop Filter
The 5000X version of the MCH includes a snoop filter. Depending on the application of the
workstation, you can use this feature to enhance the performance of the workstation by
eliminating traffic on the snooped system bus of the processor being snooped. By removing
snoops from the snooped bus, the full bandwidth is available for other transactions.
3.2
Enterprise South Bridge (ESB2-E)
The ESB2-E is a multi-function device that provides four distinct functions: an I/O controller, a
PCI-X* bridge, GB Ethernet controller, and baseboard management controller (BMC). Each
function has its own set of configuration registers. Once configured, each appears to the system
as a distinct hardware controller.
The ESB2-E provides the gateway to all PC-compatible I/O devices and features. The
workstation board uses the following ESB2-E features:
PCI-X bus interface
Six-channel SATA interface with SATA Busy LED Control
Dual GbE MAC
Baseboard Management Controller (BMC)
Single ATA interface, with Ultra DMA 100 capability
Universal Serial Bus 2.0 (USB) interface
Removable media drives
LPC bus interface
PC-compatible timer/counter and DMA controllers
APIC and 8259 interrupt controller
Power management
System RTC
General purpose I/O
This section describes the function of most of the listed features as they pertain to this
workstation board. For more detailed information, see the Intel 631xESB/632xESB I/O
Controller Hub Datasheet.
3.2.1
PCI Subsystem
The primary I/O buses for the server board are PCI, PCI Express*, and PCI-X* with six
independent PCI bus segments. The PCI buses comply with the PCI Local Bus Specification,
Revision 2.3. The following table lists the characteristics of the PCI bus segments. Details about
each bus segment follow the table.
24
Intel order number: D66403-006
Intel® Workstation Board S5000XVN TPS
Revision 1.5
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