A technology mapping algorithm for PAL-based devices using multi-output function graphs

The objective of the technology mapping method presented in this paper is to cover a multiple-output function by a minimal number of PAL (programmable array logic) based logic blocks included in CPLDs (complex programmable logic devices). According to this method, product terms included in a logic block can be shared by several functions. The developed algorithms, implemented within the PALDec system, have been used for partitioning the benchmark circuits due to implementation by means of the PAL-based logic blocks with the restricted number of terms. The results are compared to the classical technology mapping method and synthesis of benchmarks executed by means of MACHXL and MAX+PLUS II software.