Serial communication protocol rs232 synchronous serial#
(2) string conversion: serial transfer, data is bit by bit serial transmission, and computer processing data is parallel data. In character oriented synchronization, the interface adds synchronization characters before the data block to be transmitted.
In asynchronous communication mode, the interface automatically generates start stop type frame data format. (1) data formatting: since the CPU comes from common parallel data, the interface circuit should have the task of data formatting under different serial communication modes. basic tasks of serial communication interface Among them, byte counting synchronous protocol is mainly used in DEC's network architecture.ġ. There are three types of synchronization protocols: character oriented, bit oriented, and byte oriented. It is also called a communication control procedure, or a transport control procedure, that belongs to the data link layer in the seven - layer reference model of the ISO'S OSI.Īt present, there are two kinds of communication protocols: asynchronous protocol and synchronous protocol.
The agreement includes uniform rules for data format, synchronization mode, transmission speed, transmission step, check and error correction method, and control character definition, and the two parties must abide by it together. The so-called communication protocol refers to an agreement between the two sides of communication. Rs232串口通讯-通信协议（RS232 serial communication protocol）Īdd time: Author: unknown source: unknown entry: abcd200844 read times:
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