David Jefferson

The stratixπ routing and logic architecture

This paper describes the Altera Stratix logic and routing architecture. The primary goals of the architecture were to achieve high performance and logic density. We give an overview of the entire device, and then focus on the logic and routing architecture. The Stratix logic architecture is based on a cluster of ten 4-input LUTs and its routing consists of staggered routing lines. We describe the development of the routing architecture, including its directional bias, its direct-drive routing which reduces both area and delay. The logic array block and logic cell design is also described, and new routing structures with in the logic array block, and logic element features are described.

A next generation architecture optimized for high density system level integration

Altera has developed a next generation architecture called APEX/sup TM/ to improve overall logic efficiency, performance and provide a framework to add a much broader range of features which enables complete system level integration of a users system. This new architecture will support a family of devices exceeding 2 million gates in density. Density and speed improvements are achieved through an enhanced hierarchical routing structure.