What are serial and parallel ports used for?

A serial port is able to transmit a single stream of data at a time. A parallel port is able to transmit multiple data streams at a time. A serial port sends data bit by bit after sending a bit at a time. A parallel port sends data by sending multiple bits in parallel fashion.

How communication happens in serial port?

Before each byte of data, a serial port sends a start bit, which is a single bit with a value of 0. After each byte of data, it sends a stop bit to signal that the byte is complete. It may also send a parity bit. Serial ports, also called communication (COM) ports, are bi-directional.

What type of communication is a serial port?

Computer Architecture A serial port is an interface through which peripherals can be connected as a communication channel using a serial (bit-stream) protocol. Usually, a serial mouse is connected to COMI (communication port 1). The most common type of serial port is a 25-pin D-type connector carrying RS-232 signals.

What are examples of serial ports?

Serial ports are usually identified on IBM compatible computers as COM (communications) ports. For example, a mouse might connect to COM1 and a modem to COM2. The picture shows the DB9 serial connector on a cable.

What is the difference between parallel and serial communication?

The crucial difference between serial and parallel communication is that in serial communication a single communication link is used to transfer the data from an end to another. As against in parallel communication, multiple parallel links are used that transmits each bit of data simultaneously.

Which of the following is an example of a serial port?

An asynchronous port on the computer used to connect a serial device to the computer and capable of transmitting one bit at a time. Serial ports are usually identified on IBM compatible computers as COM (communications) ports. For example, a mouse might connect to COM1 and a modem to COM2.

What is serial communication interface?

A serial communications interface (SCI) is a device that enables the serial (one bit at a time) exchange of data between a microprocessor and peripherals such as printers, external drives, scanners, or mice. In this respect, it is similar to a serial peripheral interface ( SPI ).

What is serial communication and its types?

There are two broad types of serial communication: synchronous and asynchronous. There are a very large number of different standards and protocols for serial communication, ranging from the very simple to the seriously complicated. It is important to match the right protocol with the right application.

Why do we use serial communications?

A serial connection requires fewer interconnecting cables (e.g., wires/fibers) and hence occupies less space. The extra space allows for better isolation of the channel from its surroundings. Crosstalk is less of an issue, because there are fewer conductors in proximity.