其实很简单哇,input clk,rst;
ouput clk_div;
reg clk_div_r;
reg n;
always@(posedge clk or posedge rst)
begin
if(rst==1)begin n<=0;clk_div_r<=0; end
else if(n==1)begin n<=0;clk_div_r<=~clk_div_r; end
else n<=n+1'b1;
end
assign clk_div=clk_div_r;
clk_div就是你要的2倍频时钟
追问恩 ,我想要锁相环弄的那个。
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