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2 System Board
The Input/Output Controller Hub (82801AA)
The following table shows the available ICH features.
Feature Feature
• Multi-function PCI Bus Interface:
❒ PCI at 32-bit 33 MHz.
❒ PCI Rev 2.2 Specification.
❒ 133 Mbyte/sec data transfer rate.
❒ Master PCI Device Support for up to six devices.
• Enhanced DMA Controller:
❒ Two 82C37 DMA controllers.
❒ PCI DMA with 2 PC/PCI Channels in pairs.
❒ LPC DMA.
❒ DMA Collection Buffer to provide Type-F DMA performance
for all DMA channels.
• USB, supporting:
❒ USB revision 1.1 compliant.
❒ UHCI Implementation with Two USB Ports for serial
transfers at12 or 1.5 Mbit/sec.
❒ Wake-up from sleeping states (refer to table on page 19
).
❒ Legacy keyboard/mouse software.
• Interrupt Controller:
❒ Two cascaded 82C59 controllers.
❒ Integrated I/O APIC capability.
❒ 15 Interrupt support in 8259 Mode, 24 supported in I/O APIC
mode.
❒ Serial Interrupt Protocol.
• Power Management Logic:
❒ ACPI 1.0 compliant.
❒ Support for APM-based legacy power management for non-
ACPI implementations.
❒ ACPI defined power states (S1, S3, S4, S5).
❒ ACPI power management timer.
❒ SMI generation.
❒ All registers readable/restorable for proper resume from 0 V
suspend states.
❒ PCI PME#.
• Integrated IDE Controller:
❒ Independent Timing of up to four drives.
❒ Ultra ATA/66 Mode (66 Mbytes/sec).
❒ Ultra ATA/33 Mode (33 Mbytes/sec).
❒ PIO Mode 4 transfers up to 14 Mbytes/sec.
❒ Separate IDE connections for Primary and Secondary cables.
❒ Integrated 16 x 32-bit buffer for IDE PCI Burst transfers.
❒ Write Ping-Pong Buffer for faster write performances.
• Real-Time Clock, supporting:
❒ 256-byte battery-backed CMOS RAM.
❒ Hardware implementation to indicate Century Rollover.
• System TCO Reduction Circuits:
❒ Timers to Generate SMI# and Reset Upon.
❒ Timers to Detect Improper Processor Reset.
❒ Integrated Processor Frequency Strap Logic.
• Timers Based on 82C54:
❒ System Timer, Refresh Request, Speaker Tone Output.
•SMBus
❒ Host Interface allows processor to communicate via SMBus.
❒ Compatible with 2-wire I
2
C bus.
• System Timer, Refresh Request, Speaker Tone Output. • GPIO:
❒ TTL, Open-Drain, Inversion.
• Firmware Hub (FWH) interface. • 3.3 V operation with 5 V Tolerant Buffers for IDE and PCI signals.
• 241 BGA Package. • Alert-On-LAN (AOL) support.