(Detailed RS-232-C
Several serial communication standards have been developed and used. But they are all improved on the basis of RS-232 standard. Therefore, we will mainly discuss RS-232C. Rs-323c standard is a communication protocol issued by American EIA (Electronic Industry Association) and bell in 1969. It is suitable for communication with data transmission rate in the range of 0 ~ 20000b / s. This standard specifies problems related to serial communication interface, such as signal line function and electrical characteristics. Because the manufacturers of general equipment produce communication equipment compatible with RS-232C standard, it has been widely used as the standard for the communication interface of microcomputer.)
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