50M分频道8hz的话 50 000 000/8=6250000
reg clk_div8;
reg [23:0]cnt;
always @(posedge clk)
begin
if(!rst_n)
begin
clk_div8<=0;
cnt<=0;
end
else if(cnt==24'd3125000)
begin
cnt<=0;
clk_div8<=~clk_div8;
end
end
分析:50M周围为20ns,在3125000*20ns=0.0625s后clk_div8翻转,即clk_div8周期为2*0.0625s=0.125s,然后就是8hz了,可以追问,望采纳