本程序演示从P3.4、P3.5和P1.0输出时钟信号。使用18.432MHz的晶振和STC12C5AXXS2系列单片机，从两个定时器引脚以及独立波特率发生器分别输出频率为150k、200k和100k赫兹的矩形波。内有C语言和汇编语言，用Keil C编译。-Demonstration of this procedure from the P3.4, P3.5 and P1.0 output clock signal. 18.432MHz crystal and the use of the STC12C5AXXS2 series single-chip, pin-timer, as well as from two independent baud rate generator output frequency, respectively, for 150k, 200k and 100k Hz rectangular wave. There are C language and assembly language. Compile it with Keil C.