📌SERIAL COMMUNICATION:-
💁♂️The process of transmitting data one bit at a time.
Data may be 8bit/32bit/16bit.
Example:-interfacing between a keyboard and a computer.
📌PARALLEL COMMUNICATION:-
💁♂️It is method of conveying multiple data simultaneously at a time.
Example:-integrated circuits,in peripheral buses and in memory devices such as RAM.
✏️NEED FOR SERIAL COMMUNICATION
💁♂️Within a microcontroller, the data is transmitted in parallel form, i.e more than one bit at a time , typically 8 or 16 bits.
💁♂️The parallel transmission provides faster data transfer.
💁♂️To transmit data over long distance,the parallel data transfer is not preferred because it requires many wires which results in higher cost of a system.
💁♂️For long distance data to be transmitted is usually converted converted from the parallel to serial,so that it can be transmitted through a single wire one bit at a time.
💁♂️The data is again converted back into parallel form so that it can be easily processed.
✏️TYPES OF SERIAL COMMUNICATION
There are three types:-
1) simplex
2) half duplex
3) full duplex
1) Simplex serial communication:-
💁♂️A simplex system can transmit data only in one direction i.e it is a one way communication.
Example:-Radio and television broadcasting,sending the data from keyboard to CPU,etc….
2) Half duplex communication:-
💁♂️The data transfer can take place in both directions between the two systems,but only in one direction at a time.
Example:-two-way radio system is a half-duplex system
3) FULL DUPLEX COMMUNICATION:-
💁♂️The communication can take place in both the direction simultaneously between two systems and separate wires are required for transmission.
Example:-Telephone line
This system is illustrated in figure
TXD=Transmitter output.
RXD=Receiver input.
💁♂️In simple words, if I'm explaining all 3 types of serial communication this, we could understand this in Figure shown below 👇
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