Which of the following signals can control the data output rate of the asynchronous SRAM memory chip？ 以下哪个信号可以控制异步SRAM芯片的数据输出速率 A、Period of address signal 地址信号的周期 B、Period of writing control signal 写控制信号的周期 C、 Period of reading control signal 读控制信号的周期 D、Period of chip select signal 片选信号的周期