What is the purpose of serial communication?
Serial communication program block diagram, serial communication refers to the peripheral and computer, through data, signal line, ground wire, control line and so on, according to the position of data transmission. This communication method uses less data lines, and can save communication costs in long-distance communications, but its transmission speed is lower than parallel transmission.
Is a serial interface can accept the parallel data from the CPU characters into a continuous serial data stream is sent at the same time, the device will accept the serial data stream into data character of the parallel supply CPU. A circuit that generally performs this function is called a serial interface circuit.
RS-232 (ANSI/EIA-232 standard) is the serial connection standard on IBM-PC and its compatible computer. It can be used for many purposes, such as connecting the mouse, printer or Modem, and also connecting industrial instruments and meters. For driving and wiring improvements, in actual applications, the transmission length or speed of RS-232 often exceeds the standard value. RS-232 is limited to point to point communications between PC serial ports and devices. RS-232 serial communication, the longest distance is 50 feet.
Serial port is a very general device communication protocol on computer. Most computers (not including laptops) contain two RS-232 based serial ports. Serial port is also a common communication protocol for instrument and meter equipment. Many GPIB compatible devices also have RS-232 ports. At the same time, serial communication protocol can also be used to acquire data of remote acquisition device.
