stc单片机IO配置与PWM

CR= 1;//启动PCA计数机 CL 00->

样电阻,阻值是0.01欧

RXD为接收数据的引脚，TXD为发送数据的引脚

PMW0 输出全1

PCA_PWM0=0x00;
CCAP0H = 0x00;

PMW0输出全0
PCA_PWM0=0x00;
CCAP0H = 0x00;//set PWM wide