[Intel]

Overview
The Intel® 631xESB/632xESB I/O Controller Hub component integrates bridge functionality for PCI Express, PCI-X, conventional PCI, LPC, USB, SATA, IDE and SMBus, and dual-Gigabit ethernet MAC components as well as numerous board management functions. It provides for all system I/O, allowing for simpler system board architectures and smaller board areas than if discrete components were used.

Thus, the Intel® 631xESB/632xESB I/O Controller Hub provides extensive I/O support. Functions and capabilities include:

• Enterprise South Bridge Interface (ESI) and PCI Express X8 upstream ports to Memory Controller Hub (MCH)
• PCI Express* Specification, Revision 1.0a-compliant
• PCI Protocol Addendum and PCI Electrical and Mechanical Addendum to the PCI Local Bus Specification, Revision 2.0a-compliant
• PCI Local Bus Specification, Revision 2.3-compliant with support for 33 MHz PCI operations (supports up to seven Req/Gnt pairs)
• ACPI power management logic support
• Enhanced DMA controller, interrupt controller, and timer functions
• Integrated serial ATA host controller with independent DMA operation on six ports and AHCI support
• Integrated IDE controller supports Ultra ATA100/66/33
• USB host interface with support for eight USB ports; four UHCI host controllers;
one EHCI high-speed USB 2.0 Host controller
• Dual Gigabit MAC with Kumeran interface to dual-PHY component
• PICMG-compliant Serdes backplane Gigabit Ethernet support
• Integrated Board Management Controller with basic ROM firmware, expandability through external flash and RAM memories
• System Management Bus (SMBus) Specification, Version 2.0-compliant with additional support for I2C* devices
• Audio interface (AC’97 and Intel® High Definition Audio)
• Low Pin Count (LPC) interface
• Firmware Hub (FWH) interface support