Serial Interface Protocols3/21/2021
Moreover, fewer IO (input-output) lines are required to interface components.In general, communication means interchange of information between individuals through written documents, verbal words, audio and video lessons.The protocol is the secure and reliable form of communication having a set of rules addressed by the source host ( sender ) and destination host ( receiver ).To have a better insight, I have explained the concept of serial communication.
Some of the well-known interfaces used for the data exchange are RS-232, RS-485, I2C, SPI etc. In other words, we can say Binary One represents a logic HIGH or 5 Volts, and zero represents a logic LOW or 0 Volts. Serial communication can take many forms depending on the type of transmission mode and data transfer. The transmission modes are classified as Simplex, Half Duplex, and Full Duplex. ![]() Only one client (either the sender or receiver is active at a time). ![]() If a client (laptop) sends a request for a web page, the web server processes the application and sends back the information. Here both sender and receiver can transmit and receive at the same time. Endianness is the way of storing the data at a particular memory address. How is this data stored in memory To have a clear idea, I have explained the difference between Little Endian and Big Endian. Serial communication is a technique used to send data bit by bit using a two-wires i.e. But, which bit goes out first Most Significant Bit MSB (7 th bit) or Least Significant Bit- LSB (0 th Bit). We cannot say. Here I am considering LSB is moving first (for little Endian). Printers and Xerox machines use parallel communication for faster data transfer. Hence, occupying less space and more resistant to cross-talk. The main advantage of serial communication is, the cost of the entire embedded system becomes cheap and transmits the information over a long distance. Serial transfer is used in DCE (Data communication Equipment) devices like a modem. The advantage of parallel communication is it is fast but its drawback is it use more number of IO (input-output) lines. Parallel transfer is used in PC (personal computer) for interconnecting CPU (central processing unit), RAM (random access memory), modems, audio, video and network hardware. The clock signal is different for each serial device, and it is categorized as synchronous protocol and asynchronous protocol.
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