TRS232N

The TRS-232-N is an interface with transmit, receive and sync lines. It is a widely used standard serial interface in the communications technology where it is used as a control, test and diagnostic protocol. The interface is a functional expansion of the TRS-232 standard. It was developed in response to the need to provide an interface with more control lines, which can be used to reduce the number of cables and crossovers in point-to-point and direct connection links. In this article, we will be discussing the application fields, features, and working principles of the TRS-232-N.

Application Field

The TRS-232-N is an economical standard serial transmission interface and is the basis for many industrial and consumer applications. It is used in industry, science, and consumer applications such as data links in office systems, telephony, POS systems, audio/video equipment, automotive, and remote monitoring systems. This interface is also used in PC-based automation systems, embedded and/or distributed control systems, test and measurement equipment, building automation systems and medical applications.

Features

The TRS-232-N is a functional extension of the TRS-232 interface and is used to reduce the number of cables, connectors, and crossovers required for straight-through and point-to-point applications. It comes with a dedicated line for synchronizing the transmission and reception of data, and two additional control lines for connecting two computers together, thereby eliminating the need for splitters. This interface also features an 11-bit cyclic redundancy check (CRC) which allows for error detection. The full duplex capability of the interface allows for simultaneous transmission and reception of data.

Working Principle

The TRS-232-N interface is typically used to connect two devices such as computers, modems, and terminals. It works by sending and receiving data serially over a single cable, with the data being encoded in Manchester coding. The data is then split at the receiver, with the transmitted bits being divided into byte-pairs of 16-bits. The transmitter must synchronize its data with the receiver, and this is done through the use of a dedicated synchronization line. The interface can also detect transmission errors by calculating the CRC sum of the transmitted data.

To ensure reliable communication between two devices connected via TRS-232-N, the following protocol is used: The two devices establish a connection, exchange their parameters and then agree on a set of communication parameters. The two devices then negotiate the start and end of transmission, the rates at which data will be exchanged, and if error correction or data detection is necessary. Once the data is transmitted and received, the two devices then negotiate a disconnection.

The TRS-232-N interface is a powerful and economical standard serial transmission interface that is widely used across a range of fields. It is used to reduce the cost, complexity, and number of cables and crossovers required in point-to-point and direct connection links, and offers a number of features such as a cyclic redundancy check and its full-duplex capability. It is a reliable protocol with low power consumption requirements, making it ideal for low-power applications.