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Intel® Server Board SE7320SP2 & Intel Server Board SE7525GP2 TPS Functional Architecture
Revision 2.0
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The Intel E7525 MCH is a root class component as defined in the PCI Express Interface
Specification, Rev 1.0a. The PCI Express interfaces of the MCH support connection to a variety
of bridges and devices compliant with the same revision of the specification. Refer to the
SE7320SP2 / SE7525GP2 Tested Hardware and OS List for the add-in cards tested on this
platform.
3.3.1.4 Hub Interface
The MCH interfaces with the Intel 6300ESB I/O Controller Hub via a dedicated Hub Interface
supporting a peak bandwidth of 266MB/s using a x4 base clock of 66MHz.
3.4 Intel® 6300ESB ICH
The Intel 6300ESB is a multi-function device providing an upstream hub interface for access to
several embedded I/O functions and features including:
• PCI Local Bus Specification, Revision 2.3 with support for 33MHz PCI operations.
• PCI-X 2.2 specification support for up to PCI-X 66MHz operation
• ACPI power management logic support
• Enhanced DMA controller, interrupt controller, and timer functions
• Integrated IDE controller with support for Ultra ATA100/66/33
• Integrated SATA controller
• USB host interface with support for four USB ports; four UHCI host controllers; one EHCI
high-speed USB 2.0 host controller
• System Management Bus (SMBus) Specification, Version 2.0 with additional support for
I2C devices
• Low Pin Count (LPC) interface
• Firmware Hub (FWH) interface support
Each function within the Intel 6300ESB I/O Controller has its own set of configuration registers.
Once configured, each appears to the system as a distinct hardware controller sharing the same
PCI bus interface.
3.4.1 PCI Interface
The Intel 6300ESB I/O Controller PCI interface provides a 33MHz, Revision 2.3 compliant
implementation. All PCI signals are 5-V tolerant, except PME#. The Intel 6300ESB I/O
Controller integrates a PCI arbiter that supports up to four external PCI bus masters in addition
to the internal Intel 6300ESB requests. On the server boards SE7320SP2 and SE7525GP2 this
PCI interface is used to support on-board PCI devices including the ATI* video controller, Intel
82541 Gigabit NIC, and the Super I/O chip.
Additionally the Intel 6300ESB I/O Controller Hub provides a 64-bit/66MHz revision 2.2
compliant PCI-X implementation. The bus is also PCI 2.2 compliant to provide backwards
compatibility with PCI devices. The Intel 6300ESB ICH also works as the PCI arbiter on this
bus and supports up to four external PCI bus masters in addition to the Intel 6300ESB I/O
Controller. On the server boards SE7320SP2 and SE7525GP2 there are two 3.3V PCI-X
connectors on this bus.