RS-232 serial interface standard

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RS-232 serial interface standard [Copy link]

RS-232 serial interface standard
Currently, RS-232 is the most widely used serial interface in PC and communication industry. RS-232 is defined as a single-ended standard that increases the communication distance in low-speed serial communication. RS-232 adopts unbalanced transmission mode, which is the so-called single-ended communication. Since the difference between its sending level and receiving level is only about 2V to 3V, its common mode suppression ability is poor. In addition, the distributed capacitance on the twisted pair line, its maximum transmission distance is about 15 meters, and the maximum rate is 20kb/s. RS-232 is designed for point-to-point communication (that is, only one pair of receiving and transmitting devices), and its driver load is 3~7kΩ. Therefore, RS-232 is suitable for communication between local devices.