82371FB Datasheet, PDF(1/122 Page) Intel Corporation – 82371FB (PIIX) AND 82371SB (PIIX3) PCI ISA IDE XCELERATOR

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82371FB Datasheet, PDF (1/122 Pages) Intel Corporation – 82371FB (PIIX) AND 82371SB (PIIX3) PCI ISA IDE XCELERATOR

82371FB (PIIX) AND 82371SB (PIIX3)

PCI ISA IDE XCELERATOR

n Bridge Between the PCI Bus and ISA Bus

n PCI and ISA Master/Slave Interface

ï£§ PCI from 25â33 MHz

ï£§ ISA from 7.5â8.33 MHz

ï£§ 5 ISA Slots

n Fast IDE Interface

ï£§ Supports PIO and Bus Master IDE

ï£§ Supports up to Mode 4 Timings

ï£§ Transfer Rates to 22 MB/Sec

ï£§ 8 x 32-Bit Buffer for Bus Master IDE PCI

Burst Transfers

ï£§ Separate Master/Slave IDE Mode

Support (PIIX3)

n Plug-n-Play Port for Motherboard Devices

ï£§ 2 Steerable DMA Channels (PIIX Only)

ï£§ Fast DMA with 4-Byte Buffer (PIIX Only)

ï£§ 2 Steerable Interrupts Lines on the PIIX

and 1 Steerable Interrupt Line on the

PIIX3

ï£§ 1 Programmable Chip Select

n Steerable PCI Interrupts for PCI Device Plug-

n-Play

n PCI Specification Revision 2.1 Compliant

(PIIX3)

n Functionality of One 82C54 Timer

ï£§ System Timer; Refresh Request;

Speaker Tone Output

n Two 82C59 Interrupt Controller Functions

ï£§ 14 Interrupts Supported

ï£§ Independently Programmable for

Edge/Level Sensitivity

n Enhanced DMA Functions

ï£§ Two 8237 DMA Controllers

ï£§ Fast Type F DMA

ï£§ Compatible DMA Transfers

ï£§ 7 Independently Programmable

Channels

n X-Bus Peripheral Support

ï£§ Chip Select Decode

ï£§ Controls Lower X-Bus Data Byte

Transceiver

n I/O Advanced Programmable Interrupt

Controller (IOAPIC) Support (PIIX3)

n Universal Serial Bus (USB) Host Controller

(PIIX3)

ï£§ Compatible with Universal Host

Controller Interface (UHCI)

ï£§ Contains Root Hub with 2 USB Ports

n System Power Management (Intel SMM

Support)

ï£§ Programmable System Management

Interrupt (SMI)âHardware Events,

Software Events, EXTSMI#

ï£§ Programmable CPU Clock Control

(STPCLK#)

ï£§ Fast On/Off Mode

n Non-Maskable Interrupts (NMI)

ï£§ PCI System Error Reporting

n NAND Tree for Board-Level ATE Testing

n 208-Pin QFP

The 82371FB (PIIX) and 82371SB (PIIX3) PCI ISA IDE Xcelerators are multi-function PCI devices

implementing a PCI-to-ISA bridge function and an PCI IDE function. In addition, the PIIX3 implements a

Universal Serial Bus host/hub function. As a PCI-to-ISA bridge, the PIIX/PIIX3 integrates many common I/O

functions found in ISA-based PC systemsâa seven-channel DMA controller, two 82C59 interrupt controllers,

an 8254 timer/counter, and power management support. In addition to compatible transfers, each DMA

channel supports type F transfers. Chip select decoding is provided for BIOS, real time clock, and keyboard

controller. Edge/Level interrupts and interrupt steering are supported for PCI plug and play compatibility. The

PIIX/PIIX3 supports two IDE connectors for up to four IDE devices providing an interface for IDE hard disks

and CD ROMs. The PIIX/PIIX3 provides motherboard plug and play compatibility. PIIX implements two

steerable DMA channels (including type F transfers) and up to two steerable interrupt lines. PIIX3 implements

one steerable interrupt line. The interrupt lines can be routed to any of the available ISA interrupts. Both

PIIX/PIIX3 implement a programmable chip select.

PIIX3 contains a Universal Serial Bus (USB) Host Controller that is UHCI compatible. The Host Controllerâs

root hub has two programmable USB ports. PIIX3 also provides support for an external IOAPIC.

This document describes the PIIX3 Component. Unshaded areas describe the 82371FB PIIX. Shaded areas,

like this one, describe the PIIX3 operations that differ from the 82371FB PIIX.

April 1997

Order Number: 290550-002

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