The document introduces a local bus accelerator product called 82433LX/82433NX. This product supports the full 64-bit Pentium processor data bus, with frequencies up to 66 MHz. It also drives 3.3V signal levels on the CPU data and address buses (82433NX), and provides a 64-bit interface to DRAM and a 32-bit interface to PCI. Additionally, the product features five integrated write posting and read prefetch buffers to increase CPU and PCI performance. It supports concurrent operations on the host and PCI buses, synchronous operation to the CPU and PCI clocks, and burst read and writes of memory from the host and PCI buses. Sequential CPU writes to PCI are converted to zero wait-state PCI bursts with optional TRDY connection. Byte parity support is provided for the host and memory buses, with optional parity generation and checking for various transfers. The product is packaged in a 160-pin QFP package.
This document describes the Intel 82433LX and 82433NX Local Bus Accelerator (LBX) components. These devices provide a high-performance data path between the host CPU/Cache and main memory, as well as interfaces to the PCI Local Bus. The architecture supports concurrent operations on the host and PCI buses through integrated buffers.
| Package Type | 160-Pin QFP Package |
|---|
The 82433LX is intended to be used with the 82434LX PCMC.
It supports byte parity for the host and main memory buses.