From Robotics

RS-232 is the most known serial port used in transmitting the data in communication and interface. Even though a serial port is harder to program than the parallel port, this is the most effective method in which the data transmission requires fewer wires and less cost. The RS-232 is the communication line which enables data transmission by only using three wire links. The three links provide ‘transmit,’ ‘receive,’ and common ground.

The ‘transmit’ and ‘receive’ line on this connecter send and receive data between the computers. As the name indicates, the data is transmitted serially. The two pins are TXD & RXD. There are other lines on this port such as RTS, CTS, DSR, DTR, and RTS, RI. The ‘1’ and ‘0’ are the data which defines a voltage level of 3 V to 25 V and -3 V to -25 V respectively.

The electrical characteristics of the serial port as per the EIA (Electronics Industry Association) RS-232C Standard specifies a maximum baud rate of 20,000bps, which is slow compared to today’s standard speed. For this reason, we have chosen the new RS-232D Standard, which was recently released.

The RS-232D has existed in two types, i.e., D-Type 25-pin connector and...

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Topics of Interest

Before one uses the microcontroller, he or she should be well aware of the connections of the microcontroller, like which pins are to be used as data pins and which pin is to be given the power...

3.5 USING THE PARALLEL PORT OF THE COMPUTER A port contains a set of signal lines that the CPU uses to send or receive data with other components. Ports are usually used to communicate via modem,...

6.2 RS-232C SERIAL INTERFACE SYSTEM 6.2.1 General Description The Recommended Standard system (RS-232) was elaborated in 1962 at the request of the American Electronic Industries Association, in...

3.6 SERIAL COMMUNICATION: RS-232 RS-232 is the most known serial port used in transmitting the data in communication and interface. Even though a serial port is harder to program than the parallel...

We've already introduced the concept of serial communications, the placing of one bit after another on a single media channel. It is the most prevalent form of data communications. However, there are...

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