Introduction - If you have any usage issues, please Google them yourself
l, designed for Answer four contests, and features are as follows: (1) Answer the way how, and the number to four (2) Answer 20 seconds after the beginning of the countdown, countdown to 20 seconds after the Answer shows no overtime, and report to the police (3) can show in advance Answer Desk No. foul alarm and display (4) can display various scoring with Canada, by sub-function 2, the system reset after entering the Answer state, all the way when pressing the Answer key , the signals will be the rest of the way each Answer Answer blockade, ring tones at the same time, release the button until the road, the road signs showing the number Answer Desk. 3, using VHDL language design meets the functional requirements of the above Answer four devices, and design method-level design of the circuit