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82443GX

Intel® 440GX AGPset: 82443GX Host Bridge/Controller

Intel 

Intel 82443GX Features

• Processor/System bus support

— Optimized for Pentium® II and

Pentium® II Xeon™ processors at

100 MHz system bus frequency

— Supports full symmetric

Multiprocessor (SMP) Protocol for

up to two processors; I/O APIC

related buffer management support

(WSC# signal)

— In-order transaction and dynamic

deferred transaction support

— Supports GTL+ and AGTL+ bus

driver technology (gated GTL+

receivers for reduced power)

• Integrated DRAM controller

— 16 MB to 2 GB

— Supports up to 4 double-sided

DIMMs (8 rows memory)

— 64-bit data interface with ECC

support (SDRAM only)

— Unbuffered and Registered

SDRAM (Synchronous) Support

(x-1-1-1 access @ 100 MHz)

— Enhanced SDRAM Open Page

Architecture Support for 16-, 64-,

128-, and 256-Mbit* DRAM devices

with 2k, 4k and 8k page sizes

• PCI bus interface

— PCI Rev. 2.1, 3.3V and 5V, 33MHz

interface compliant

— PCI Parity Generation Support

— Data streaming support from PCI to

DRAM

— Delayed Transaction support for

PCI-DRAM Reads

— Supports concurrent CPU, AGP and

PCI transactions to main memory

• AGP interface

— Supports single AGP compliant

device (AGP-66/133 3.3V device)

— AGP Specification Rev 1.0 compliant

— AGP-data/transaction flow optimized

arbitration mechanism

— AGP side-band interface for efficient

request pipelining without

interfering with the data streams

— AGP-specific data buffering

— Supports concurrent CPU, AGP and

PCI transactions to main memory

— AGP high-priority transactions

(“expedite”) support

• Power management functions

— Stop Clock Grant and Halt special

cycle translation (host to PCI Bus)

— “Deep Green” Desktop support for

system suspend/resume (i.e., DRAM

and power-on suspend)

— SDRAM self-refresh power down

support in suspend mode

— Independent, internal dynamic clock

gating reduces average power

dissipation

— Static STOP CLOCK support

— Power-on Suspend mode

— Suspend to DRAM

— ACPI compliant power management

• Packaging/Voltage

— 492 Pin BGA

— 3.3V core & mixed 3.3V & GTL I/O

• Supporting I/O Bridge

— System Management Bus (SMB)

with support for DIMM Serial

Presence Detect (SPD)

— PCI-ISA Bridge (PIIX4E)

— Power Management Support

— 3.3V core and mixed 5V, 3.3V I/O

and interface to the 2.5V CPU signals

via open-drain output buffers

The Intel® 440GX AGPset is intended for the Pentium® II processor and Pentium® II Xeon™

processor platforms. The 82443GX Host Bridge provides a Host-to-PCI bridge, optimized

DRAM controller and data path, and an Accelerated Graphic Port (AGP) interface. AGP is a

high performance, component level interconnect targeted at 3D graphics applications and is

based on a set of performance enhancements to PCI.

The I/O subsystem portion of the Intel® 440GX AGPset platform is based on the 82371EB

(PIIX4E), a highly integrated version of the Intel’s PCI-ISA bridge family.

* Proper operation of the 82443GX AGPset with 256-Mbit SDRAM devices has not yet been verified. Intel’s current plans are

to validate this feature in the second half of 1998 when 256-Mbit SDRAM devices are available.

The Intel 82443GX may contain design defects or errors known as errata which may cause the products to deviate from

published specifications. Current characterized errata are available on request.

82443GX Host Bridge Datasheet

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