240844-001 82345 199010

The Intel 82345 Data Buffer is a crucial component of the 82340DX chip set, designed for high-performance 386™ DX processor-based PC/AT-compatible systems. Its primary function is to provide comprehensive data buffering and routing between the CPU bus, Memory Data (MD) bus, eXtended Data (XD) bus, and Slot Data (SD) bus.

Key features include:

• Data Routing & Conversion: Routes data between the four main buses. For reads, it latches data from the MD bus for early CAS terminations, checks parity, and converts data from 8/16 bits to 16/24/32 bits when reading from ROM, XD, or SD buses, optimizing the 386DX's pipelined mode.
• Write Operations: Supports posted and non-posted writes from the CPU or cache controllers, generates parity for MD bus writes, and performs data conversion for 32- or 16-bit writes to 16- or 8-bit devices on the XD/SD buses.
• System Optimization: Facilitates optimized DRAM access (including potential zero-wait-state operation), supports data routing under DMA or bus master control, and allows byte swapping on the SD bus.
• Testability: Includes a TRI# pin to disable all outputs for board-level testing.