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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 I/O subsystem portion of the Intel? 440BX AGPset platform is based on the 82371EB (PIIX4E), a highly integrated version of the Intel’s PCI-ISA bridge family. The Intel? 440BX AGPset is ideal for the Mobile AGPset Pentium II processor platforms; providing full support for all system suspend modes and segmented power planes.

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