使用晶体频率为22.1184MHz的AT89C52单片机，串行口应用工作方式1，以9600bps的波特率向外发送数据，数据为十个数字‘0’到‘9’，循环不断地发送。-Use AT89C52 microcontroller 22.1184MHz crystal frequency, and a serial port applications work in order to send out the baud rate of 9600bps data, as ten numbers ' 0 ' to ' 9' , circulating constantly sending.