verilog实现上面的电路:
module pulse_syc( input sclk_1, input sclk_2, input p_in, output p_out, output p_out1 ); reg p_in_reg=0; reg delay0,delay1,delay2; wire mux_2; assign mux_2=(p_in==1'b1)?~p_in_reg:p_in_reg;
always@(posedge sclk_1) p_in_reg<=mux_2; assign p_out1=p_in_reg; always@(posedge sclk_2) {delay2,delay1,delay0}<={delay1,delay0,p_in_reg}; assign p_out=delay2^delay1; endmodule
使用条件:输入脉冲的间隔至少是两个同步器时钟周期
快时钟到慢时钟仿真结果:
间隔两个同步器时钟周期时:
间隔小于两个同步器时钟周期时:
慢时钟到快时钟仿真结果:
间隔大于两个同步器时钟:
间隔小于两个同步器时钟:
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