fdivision.v.bak

verilog分频器～时钟为50hmz

module fdivision(RESET,F10M,F500K);
input F10M,RESET;
output F500K;
reg F500K;
reg [7:0]j;
  always @(posedge F10M)
    if(!RESET)          //??????
      begin
        F500K <= 0;
        j <= 0;
      end
    else 
      begin
        if(j==19)      //????????????F500K???????
          begin
            j <= 0;
            F500K <= ~F500K;
          end
        else
          j <= j+1;
      end
endmodule