Improving FPGA Routing Architectures Using Architecture and CAD Interactions
نویسندگان
چکیده
Using Architecture and CAD Interactions Benjamin Tseng, Jonathan Rose, Stephen Brown Department of Electrical Engineering, University of Toronto, Ontario, Canada Abstract This paper examines the interactions between the CAD tools that are used to con gure an FPGA's routing resources and the design of the routing architecture itself. Such an understanding is used to determine where to reduce the number of routing switches in the FPGA while maintaining routability. Experiments are used to study a switch block that was previously thought to have unacceptably low exibility [7]. We show that the performance of this switch block can be improved by adapting the global router to require less exibility in the architecture, and by careful placement of physical pins on the logic blocks. Also, it is demonstrated that the fewest routing switches are required when each logical pin appears on only one side of the logic cell rather than two or more. 1
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