DECchip 21071-AA and 21072-AA Chipsets

This document provides a comprehensive technical reference for the DECchip 21071-AA and 21072-AA chipsets, designed to support the DECchip 21064 Alpha AXP microprocessor. It includes:

• System Overview: Features of the chipsets, including support for secondary cache and memory controllers, and PCI bridge functionality.
• Pin Descriptions: Detailed pinouts for the 21071-CA (controller), 21071-DA (PCI interface), and 21071-BA (data path) chips.
• Architecture: Detailed operational descriptions of the bus interfaces, cache control, DMA transactions, and internal registers.
• Electrical and Timing Data: Specifications for power, maximum ratings, clock skews, and timing diagrams for various transactions (CPU and DMA).
• Programming Reference: Information on internal registers and control status registers (CSRs) for programming.
• Power-up and Initialization: Requirements for system initialization.