78. D Flip-Flop with Asynchronous Reset

module dff_async_reset (
    input  CLK,
    input  RST,
    input  D,
    output reg Q
);
    // async active-high reset with posedge sensitivity
    always @(posedge CLK or posedge RST) begin
        if(RST)
            Q <= 0;
        else
            Q <= D;
    end
endmodule