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).