82443LX中文资料英特尔数据手册PDF规格书

The 82443LX (PAC) is the first generation of desktop AGPset designed for the Pentium II processor. The 82443LX PCI A.G.P. Controller (PAC) integrates a Host-to-PCI bridge, optimized DRAM controller and data path, and an Accelerated Graphics Port (A.G.P.) interface. A.G.P. is a high performance, component level interconnect, targeted at 3D graphics applications and based on a set of performance enhancements to PCI. The I/O subsystem portion of the PAC platform is based on the PIIX4, a highly integrated version of the Intel’s PCI-to-ISA bridge family. PAC is developed as the ultimate Pentium II processor platform and is targeted for emerging 3D graphics and multimedia applications. The 440LX AGPset may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request.

■ Supports the Pentium II Processor at a Bus Frequency of 66 MHz

- Supports 32-Bit Addressing

- Optimized In-Order and Request Queue

- Full Symmetric Multi-Processor (SMP) Protocol for Up to Two Processors

- Dynamic Deferred Transaction Support

- GTL+ Compliant Host Bus Supports WC Cycles

■ Integrated DRAM Controller

- EDO (Extended Data Out), and Synchronous DRAM Support

- Supports a Maximum Memory Size of 512 MB With SDRAM, or 1 GB With EDO

- 64/72-bit Path to Memory

- Configurable DRAM Interface

- Support for Auto Detection of Memory Type: (DIMM Serial Presence Detect)

- 8 RAS Lines Available

- Support for 4-, 16- and 64-Mbit DRAM devices

- Support for Symmetrical and Asymmetrical DRAM Addressing

- Configurable Support for ECC/EC

- ECC With Single Bit Error Correction and Multiple Bit Error Detection

- Read-Around-Write Support for Host and PCI DRAM Read Accesses

- Supports 3.3V DRAMs

■ Accelerated Graphics Port (A.G.P.) Interface

- A.G.P. Specification Compliant

- A.G.P. 66/133 MHz 3.3V Devices Supported

- Synchronous Coupling to the Host Bus Frequency

■ PCI Bus Interface

- PCI Revision 2.1 Interface Compliant

- Greater Than 100-MBps Data Streaming for PCI-to-DRAM Accesses

- Integrated Arbiter With Multi Transaction PCI Arbitration Acceleration Hooks

- Five PCI Bus Masters are Supported in Addition to the Host and PCI-to ISA I/O Bridge

- Delayed Transaction Support

- PCI Parity Checking and Generation Support

■ Data Buffering For Increased Performance

- Extensive CPU-to-DRAM, PCI-to DRAM, and A.G.P.-to-DRAM Write Data Buffering

- CPU-to-A.G.P., PCI-to-A.G.P., and A.G.P.-to-PCI Data Buffering

- Write Combining Support for CPU-to-PCI Burst Writes

- Supports Concurrent Host, PCI, and A.G.P. Transactions to Main Memory

■ System Management Mode (SMM) Compliant

■ 492 Pin BGA Package