US Patent 10402521 Programmable integrated circuits for emulation

Methods and apparatus are described for providing and using programmable ICs suitable for meeting the unique desires of large hardware emulation systems. One example method of classifying a programmable IC having impaired circuitry generally includes determining a partitioning of programmable logic resources into two or more groups for classifying the programmable IC, testing the programmable IC to determine at least one location of the impaired circuitry in the programmable logic resources of the programmable IC, and classifying the programmable IC based on the at least one location of the impaired circuitry in relation to the partitioning of the programmable logic resources.