82443BX 查看數據表（PDF） - Intel

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82443BX

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

Intel 

Intel 82443BX Features

• Processor/host bus support

— Optimized for Pentium® II

processor at 100 MHz system bus

frequency; Support for 66 MHz

— 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

— Desktop optimized GTL+ bus driver

technology (gated GTL+ receivers

for reduced power)

• Integrated DRAM controller

— 8 to 512 Mbytes or 1GB (with

registered DIMMs)

— Supports up to 4 double-sided

DIMMs (8 rows memory)

— 64-bit data interface with ECC

support (SDRAM only)

— Unbuffered and Registered

SDRAM (Synchronous) DRAM

Support (x-1-1-1 access @ 66 MHz,

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

— Enhanced SDRAM Open Page

Architecture Support for 16- and

64-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)

— Mobile and “Deep Green” Desktop

support for system suspend/resume

(i.e., DRAM and power-on suspend)

— Dynamic power down of idle DRAM

rows

— 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 and mixed 3.3V and 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® 440BX AGPset is intended for the Pentium® II processor platform and emerging 3D

graphics/multimedia applications. The 82443BX 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 Intel 82443BX 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.

82443BX Host Bridge Datasheet

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