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A new global router for row-based layout

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2 Author(s)
Lee, K.-W. ; Dept. of Electr. Eng., Yale Univ., New Haven, CT, USA ; Sechen, C.

A global router for row-based layout styles such as sea-of-gates, gate-array, and standard cell circuits is discussed. It is part of the latest version of TimberWolfSC, a placement and routing package for row-based layout. The algorithm outperformed the UTMC Highland system on two standard benchmark circuits. In tests on ten circuits, the global router produced track counts which were an average of 27% lower than those of the previous TimberWolfSC global router. The router is an average of 30 times faster than the previous algorithm. It has been generalized to handle macro blocks on the chip, equivalent sets of pins, single pins (those without an equivalent), and circuits having many or no built-into-the-cell feeds. Indiscriminate over-the-cell routing is also handled.<>

Published in:

Computer-Aided Design, 1988. ICCAD-88. Digest of Technical Papers., IEEE International Conference on

Date of Conference:

7-10 Nov. 1988

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