Introduction - If you have any usage issues, please Google them yourself
1. VHDL design with a clear end to end so that the count range of 0 to 999 in the counter, the output is 8421BCD code 2. Decimal counter with VHDL Design (BCD_CNT) modules, seven segment display decoder circuit (BEC_LED) modules and sharing the bus switching circuit (SCAN) module. 3. With MAX+ plus Ⅱ timing simulation.