PLD/FPGA design is an electronic circuit design process that uses FPGAs and CPLDs, which are semiconductor devices with logic circuits that can be programmed after manufacturing, to implement specific functions. Circuits are described using hardware description languages such as VHDL and Verilog HDL. Functions are realized by writing configuration data to the device after logic synthesis and place-and-route. Compared to ASICs, it shortens development time, reduces initial investment, and provides flexibility for function changes and upgrades after market release. It is widely used for prototyping and small-volume production in fields requiring high-speed processing and real-time control, such as industrial equipment, communication devices, and in-vehicle systems, or for prototyping before ASIC development, making it an indispensable technology for improving product competitiveness.