code: function Max7219(board, din, cs, clk) {
      Module.call(this);
      this._board = board;
      this._din = din;
      this._cs = cs;
      this._clk = clk;
      this._intensity = 0;
      this._data = 'ffffffffffffffff';
  
      this._board.on(BoardEvent.BEFOREDISCONNECT, this.animateStop.bind(this));
      this._board.on(BoardEvent.ERROR, this.animateStop.bind(this));
      this._board.send([0xf0, 4, 8, 0, din.number, cs.number, clk.number, 0xf7]);
    }
docs: The Max7219 Class.
  
  MAX7219 is compact, serial input/output
  common-cathode display drivers that interface
  microprocessors (µPs) to 7-segment numeric LED displays
  of up to 8 digits, bar-graph displays, or 64 individual LEDs.
  
  @namespace webduino.module
  @class Max7219
  @constructor
  @param {webduino.Board} board The board that the Max7219 is attached to.
  @param {Integer} din Pin number of DIn (Data In).
  @param {Integer} cs Pin number of LOAD/CS.
  @param {Integer} clk Pin number of CLK.
  @extends webduino.Module