Rs232 driver ic

While sending data, there should be a certain delay between each bit. This delay is considered as inactive time and the RS line is at negative logic state V.

Handshaking is the process of interchanging information signals between the sender transmitter and receiver. These signals build a communication link between the transmitter and receiver. In RS, there are two types of handshaking. They are hardware handshaking and software handshaking.

The connectors DB9 and Db25 are used for handshaking purpose. To send and receive the information without loss of data, it is necessary to maintain robust communication between the transmitter and receiver. To do that, buffer is used. Buffer is a temporary storage location which allows the transmitter and receiver to store the data until the information is processed by each other at different speeds. In the above diagram, the transmitter and receiver have their own buffer.

The transmit buffer holds the characters to be sent to the receiver. While the receive buffer holds the characters received from the transmitter. If the transmitter sends data at a higher speed, the receiver may fail to receive.

To avoid this, handshaking is used. Handshaking allows the transmitter and receiver device to agree before the communication is going to start. The flow control of data transmission and reception is done using hardware handshaking.

It stops the data being replaced in the receiver buffer. Hence, this is known as software flow control. This handshaking requires 3 wires. In this state no data is transmitted. Now, the data transfer takes place. This stops the DTE to transmit the data. In this way, handshaking takes place by DTE request, taking control of the communication link and lets the DCE transfer data.

Apart from this, they both supports half duplex and full duplex communication. It sends and receives the data in serial form. The advantages of RS make it as a standard serial interface for system to system communication and also for the following benefits.

Moreover, the longer cable length introduces cross talk during serial communication. Hence, this protocol is restricted for long distance communication. Hi Neil, Thanks for the correction. Contents 1 What is RS Protocol? RS Voltage Levels. DB9 Male and Female Pinouts.

DB25 Pinout. Null Modem or Crossover Cable. Straight Cable Connection. RS Framing. Data flow. RS Handshaking Signals. You may also like. All resource types Minify. Flyers and Brochures Brochures 1. Datasheet Application Note 2. User Manual 1. Brochures 1. All resource types. Latest update. All dates. IBIS models 1. Your browser is out-of-date. Don't show this message again I got it. Google Chrome Mozilla Firefox. Did you know? Receive updates. Don't show anymore. Submit E-mail address: Please enter a valid email address.

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