What is the relationship among FPGA, CPLD, ASIC and PLD?

FPGA, CPLD, ASIC and PLD are commonly used terms in digital circuit design, and their relationships are as follows:

1.PLD (programmable logic device) is a general term, including FPGA and CPLD. PLD is a programmable digital circuit, which can be programmed according to the needs of users to realize different functions.

2.FPGA (Field Programmable Gate Array) and CPLD (Complex Programmable Logic Device) are both PLD. They are all programmable digital circuits, which can be programmed according to users' needs to realize different functions. The main difference between FPGA and CPLD lies in their different structures and scales. FPGA is usually larger and more complex than CPLD, and can realize more complex functions.

3.ASIC (Application Specific Integrated Circuit) is a customized digital circuit, which is designed and manufactured according to specific application requirements. ASIC is usually faster, smaller and more energy-saving than PLD, but its design and manufacturing costs are higher, so it is suitable for mass production.

ASIC is not the general name of FPGA and CPLD, but a digital circuit design method different from PLD. PLD includes FPGA and CPLD, both of which are programmable digital circuits, which can be programmed according to users' needs to realize different functions.