There are three directional structures of serial data communication, namely simplex, half-duplex and full-duplex; among them, information can only be transmitted in one direction, which is called simplex, and information can be transmitted in both directions but cannot be transmitted in both directions at the same time. Half-duplex, when information can be transmitted in both directions at the same time, it is called full-duplex.
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There are three directional structures of serial data communication, namely simplex , half-duplex and full-duplex.
The information can only be transmitted in one direction, which is called simplex; the information that can be transmitted in both directions but cannot be transmitted in both directions at the same time is called half-duplex; the information that can be transmitted in both directions at the same time is called full duplex. Serial communication is divided into two methods: asynchronous communication and synchronous communication. In microcontrollers, asynchronous communication is mainly used.
In serial communication, data is transmitted bit by bit, and each bit of data occupies a fixed length of time. A few communication lines can be used to exchange information between systems. It is especially suitable for computers and computers. Long-distance communication between computers and peripheral devices.
Serial communication is mostly used for serial transmission of data between systems (multi-master control systems), between devices (main control device and auxiliary devices), and between devices (main control CPU and functional chips). Realize data transmission and sharing.
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