Intel 631xESB/632xESB I/O Controller Hub - Viglen Download

IntroductionThe Intel ® 631xESB/632xESB I/O Controller Hub’s SMBus host controllers provide amechanism for the processor to initiate communications with SMBus peripherals(Slaves). Also, the Intel ® 631xESB/632xESB I/O Controller Hub supports Slavefunctionality, including the Host Notify protocol. Hence, the host controller supportseight command protocols of the SMBus interface (see System Management Bus(SMBus) Specification, Version 2.0): Quick Command, Send Byte, Receive Byte, WriteByte/Word, Read Byte/Word, Process Call, Block Read/Write, and Host Notify.The Intel ® 631xESB/632xESB I/O Controller Hub’s SMBus also implements hardwarebasedPacket Error Checking for data robustness and the Address Resolution Protocol(ARP) to dynamically provide addresses to all SMBus devices.ManageabilityThe Intel ® 631xESB/632xESB I/O Controller Hub integrates several functions designedto manage the system and lower the total cost of ownership (TCO) of the system.These system management functions are designed to report errors, diagnose thesystem, and recover from system lockups without the aid of an externalmicrocontroller.• TCO Timer. The Intel ® 631xESB/632xESB I/O Controller Hub’s integratedprogrammable TCO timer is used to detect system locks. The first expiration of thetimer generates an SMI# that the system can use to recover from a software lock.The second expiration of the timer causes a system reset to recover from ahardware lock.• Processor Present Indicator. The Intel ® 631xESB/632xESB I/O Controller Hublooks for the processor to fetch the first instruction after reset. If the processordoes not fetch the first instruction, the Intel ® 631xESB/632xESB I/O ControllerHub will reboot the system.• ECC Error Reporting. When detecting an ECC error, the host controller has theability to send one of several messages to the Intel ® 631xESB/632xESB I/OController Hub. The host controller can instruct the Intel ® 631xESB/632xESB I/OController Hub to generate either an SMI#, NMI, SERR#, or TCO interrupt.• Function Disable. The Intel ® 631xESB/632xESB I/O Controller Hub provides theability to disable the following integrated functions: AC ‘97 Modem, AC ‘97 Audio,IDE, LAN, USB, LPC, High Definition Audio, SATA, or SMBus. Once disabled, thesefunctions no longer decode I/O, memory, or PCI configuration space. Also, nointerrupts or power management events are generated from the disable functions.• Intruder Detect. The Intel ® 631xESB/632xESB I/O Controller Hub provides aninput signal (INTRUDER#) that can be attached to a switch that is activated by thesystem case being opened. The Intel ® 631xESB/632xESB I/O Controller Hub canbe programmed to generate an SMI# or TCO interrupt due to an active INTRUDER#signal.• SMBus 2.0. The Intel ® 631xESB/632xESB I/O Controller Hub integrates SMBuscontrollers that provide interfaces to manage peripherals (for example, serialpresence detection (SPD), thermal sensors, and so on) with host notify capabilities.• BMC. The Intel ® 631xESB/632xESB I/O Controller Hub implements an ARC4microcontroller and its memory subsystem for all manageability operations. TheBaseboard Management Controller (BMC) system includes interfaces to mostmodules and main nodes in the Intel ® 631xESB/632xESB I/O Controller Hub LAN.The BMC system is operated by firmware (embedded software) and is a flexibleinfrastructure for server management implementation.— Note: External BMC support. Refer to the 82571/82572/ESB2 LAN SystemManagement Bus Interface Application Note (AP-497) for more information.46 Intel ® 631xESB/632xESB I/O Controller Hub Datasheet