摘要
MCS5 1单片机本身的串行接口TxD ,RxD为TTL电平 ,信号幅值较低 ,易受干扰只适合很近距离的通讯 .对工控中广泛采用RS 2 32C串行接口与TTL间进行电平转换进行了分析说明 。
The TXD and RXD of serial prot in MCS51 are TTL.The sign is lower and always interrupted,so it is comfortable for communication of short distance.Thus RS-232C is widely used in controlled industry.The conversion of RS-232C and TTL is demonstrated.Sub program of connection between serial port is presented.
出处
《石家庄职业技术学院学报》
2002年第2期27-28,共2页
Journal of Shijiazhuang College of Applied Technology
