PLA-based regular structures and their synthesis

  • Authors:
  • Fan Mo;R. Brayton

  • Affiliations:
  • Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, CA, USA;-

  • Venue:
  • IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
  • Year:
  • 2006

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Abstract

Two regular circuit structures based on the programmable logic array (PLA) are proposed. They provide alternatives to the widely used standard-cell structure and have better predictability and simpler design methodologies. A whirlpool PLA is a cyclic four-level structure, which has a compact layout. Doppio-ESPRESSO, a four-level logic minimization algorithm, is developed for the synthesis of Whirlpool PLAs. A river PLA is a stack of multiple output PLAs, which uses river routing for the interconnections of the adjacent PLAs. A synthesis algorithm for river PLAs uses multilevel logic synthesis, simulated-annealing, and ESPRESSO targeting a combination of minimal area and delay.