可编程逻辑器件的发展概述

数字集成电路经历了从小规模集成电路(SSI)，中规模集成电路(MSI)，大规模集成电路(LSI)，和超大规模集成电路(VLSI)的发展过程。PLD器件由早期的可编程只读存储器、可编程逻辑阵列、可编程阵列逻辑、通用阵列逻辑发展到复杂可编程逻辑器件和现场可编程门阵列。PLD器件使数字系统的设计更加便利和高效，FPGA／CPLD和ASIC融合的趋势也越来越明显。

The Development of The PLD

The digital integrate circuit develops from SSI(Small Scale Integrated), MSI(Middle Scale Integrated), LSI(Large Scale integrated) to VLSI(Very Large Scale Integrated) and PLD(Programmable Logic Devices), which grows very fast, also make great progress from PROM(Programmable COM), PLA(Programmable Logic Array), PAL(Programmable Array Logic), GAL(Generic Array Logic)to CPLD(Complex PLD) and FPGA(Field Programmable Gate Array). The PLD makes it efficient and convenient for digital system to be designed. There is a trend of the mergence of FPGA/CPLD and ASIC(Application Specific IC).