Timer input is grab the signal and the clock signal. The clock signal timing, then grab effectively start timing. First 48Mhz clock divider for a 1hz The time signal, to grab the signal (' 0 ' ), the time to signal (sjd) assignment is invalid ' 1' , and by the the 1hz time signal output time display seven segment decoded signal: After a cycle, they put a countdown time minus one and seven-segment decoder output shown in the corresponding time values. After 10 seconds (9,8, ....., 0), indicating the time, the time signal (SJD) assignment is valid (' 0 ' ).

3基于FPGA的答题定时电路设计及仿真.docx

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