S82453KX

The Intel S82453KX is a PCI, Cache, and Memory Controller (PCMC) designed to integrate cache and main memory DRAM control functions. It provides essential bus control for transfers between the CPU, cache, main memory, and the PCI Local Bus. This controller supports write-back cache policy and offers cache sizes of 256-KBytes and 512-KBytes, which can be implemented with standard or burst SRAMs.

The S82453KX drives 3.3V signal levels on the CPU and Cache interfaces, featuring high-performance CPU/PCI/Memory interfaces via posted write and read prefetch buffers. It includes a fully synchronous PCI interface with full bus master capability. The controller supports the Pentium Processor's internal cache in either write-through or write-back mode and offers programmable attribute mapping for DOS and BIOS regions.

Key features include an integrated low-skew clock driver, an integrated second-level cache controller, and an integrated cache tag RAM. The device supports direct mapped organization and provides specific cache hit cycle times for reads and writes depending on whether burst or standard SRAMs are used. The S82453KX is housed in an FQFP package.