Intel 6321Esb I/O Controller Hub; Pci Subsystem; Table 4. Pci Bus Segment Characteristics - Intel MFSYS25V2 Specification

2BFunctional Architecture
3.2 Intel 6321ESB I/O Controller Hub
®
®
The Intel 6321ESB I/O Controller Hub is a multi-function device that provides four distinct functions: an
IO Controller, a PCI-X Bridge, a Gb Ethernet Controller, and an Integrated Baseboard Management
Controller (BMC). Each function within the Intel
configuration registers. Once configured, each appears to the system as a distinct hardware controller.
A primary role of the Intel
devices and features. The server board uses the following Intel
Dual GbE MAC
Integrated Baseboard Management Controller (BMC)
Universal Serial Bus 2.0 (USB) interface
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 server board. For
more detailed information, see the Intel
®
Intel Enterprise South Bridge-2 External Design Specification.
3.2.1

PCI Subsystem

The primary I/O buses for the server board are PCI and PCI Express*. 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.
PCI Bus Segment Voltage
PCI32
® 3.3V
Intel 6321ESB I/O
Controller Hub
PE1
®
Intel 6321ESB I/O
3.3V
Controller Hub
PCI Express*
Port2
PE2
®
Intel 6321ESB I/O
3.3V
Controller Hub
PCI Express*
Port3
PE4, PE5
3.3V
BNB PCI Express*
Ports 4,5
16
®
®
6321ESB I/O Controller Hub is to provide the gateway to all PC-compatible I/O
®
5000 Series Chipsets Server Board Family Datasheet or the

Table 4. PCI Bus Segment Characteristics

Width Speed
32 bit 33 MHz
x4 10 Gb/S
x4 10 Gb/S
x8 20 Gb/S
Intel order number: E15154-007
Intel® Compute Module MFS5000SI TPS
6321ESB I/O Controller Hub has its own set of
®
6321ESB I/O Controller Hub features:
Type
PCI Used internally for video controller
PCI This interface is not used in the Intel®
Express* Compute Module MFS5000SI design.
PCI
Used internally for LSI* 1064e SAS controller
Express*
PCI
I/O Mezzanine slot
Express*
On-board Device Support
Revision 1.4