"FPGA设计数字钟：VHDL语言实现与功能拓展"

Based on VHDL language implementation, this design uses EDA technology, with VHDL as the logical description method to design files. In the MaxplusII tool environment, a FPGA-based digital clock is created using a top-down design approach, where various basic modules work together to form the clock. The chip used is EP1K100QC208-3, consisting of clock module, control module, timing module, data decoding module, display and alarm module. After compiling and simulating the program, it is downloaded and verified on the programmable logic device. The system can display the year, month, day, hours, minutes, and seconds separately, with functions for clock calibration, reset, start and stop using keyboard inputs. Key words: digital clock; hardware description language; VHDL; FPGA; keyboard interface. In summary, the digital clock design implemented in VHDL language on FPGA is a comprehensive and functional system that accurately displays time and date information. The utilization of EDA technology and top-down design methodology ensures a structured and efficient development process. The clock's various modules work together seamlessly to provide users with a reliable and user-friendly experience. The ability to calibrate, reset, start and stop the clock using keyboard inputs adds convenience and flexibility to the system. Overall, this FPGA-based digital clock design showcases the power and versatility of hardware description languages in creating complex yet practical electronic systems.