def METHOD_NAME(self):
    for row in range(self.rows):
        for col in range(self.columns):
            self.add_pin(self.get_din_name(row, col), "INPUT")
    for row in range(self.rows):
        for col in range(self.columns):
            self.add_pin(self.get_dout_name(row, col), "OUTPUT")
    self.add_pin("clk", "INPUT")
    self.add_pin("vdd", "POWER")
    self.add_pin("gnd", "GROUND")