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在系统设计方面,已到了复杂性程度或所用的芯片数需要对所用技术进行重新评估的时候。就采用低复杂性PLD的设计人员来说,总是把眼光偏向一方,试图确定更加复杂的CPLD是否能用来替代多个复杂性较低的器件,且不放慢系统的速度。在适用的情况下,这种替代方案会缩减系统芯片数和成本,而不会降低系统性能。 CPLD正在开始成为一种用来替代目前仍然由很多设计人员使用的PAL/GAL级PLD的器件。当然,目前有(将来有)很多只用一、二个PLD的场合,从经济角度考虑、几乎没有什么使用CPLD的刺激力量。但是,有更多的系统采用6个以上的快速PLD,这些系统就可能因从PAL/GAL转移到CPLD而受益。用多个PAL/GAL做成的电路所拥有的资源一般要多于必不可少的资源,因为各种功能都是分配给多个芯片。 通过多个互连器件处理信号而增
In terms of system design, the degree of complexity has been reached or the number of chips used needs to be re-evaluated for the technology used. Designers of low-complexity PLDs tend to be biased toward trying to determine whether more complex CPLDs can be used to replace multiple, less-complex devices without slowing down the system. Where appropriate, this alternative reduces the number of system chips and costs without sacrificing system performance. The CPLD is beginning to become a replacement for PAL / GAL PLDs that are still used by many designers today. Of course, there are (in the future) a lot of situations where there are only one or two PLDs. From an economic point of view, there is little incentive to use CPLDs. However, with more systems using more than 6 fast PLDs, these systems can benefit from the move from PAL / GAL to CPLDs. Circuits made with multiple PAL / GALs typically have more resources than necessary because the various functions are assigned to multiple chips. Increased by signal processing by multiple interconnects