Asynchronous Data Transfer Method

An asynchronous method of data transfer is such a method of transmitting digital data from a transmitter to a receiver via a serial interface, in which data is transmitted at any time. In order for the receiver to initiate data reception, special bit sequences are entered that frame the data. Before the start of data transfer, a start bit is transmitted, at the end of data transfer, a stop bit ^[1] is transmitted.

Content

Application

Serial interface RS-232, RS-485;
Teletype;
In ASCII character transfer systems (e.g. keyboard).

Benefits

Ease of building a transmission system;
Low cost interface equipment.

Weaknesses

Throughput is reduced due to the transmission of service bits (start and stop);
Low data transfer rate compared to the synchronous data transfer method.

Notes

↑ Shuvalov V.P. , Zakharchenko N.V. , Shvartsman V.O. et al. Transmission of discrete messages: Textbook for high schools / ed. V.P. Shuvalova. - M .: Radio and communications, 1990 .-- 464 p. - ISBN 5-256-00852-8 .

Literature

Discrete messaging: Textbook for universities / V.P. Shuvalov, N.V. Zakharchenko, V.O. Shvartsman and others; Ed. V.P. Shuvalova. - M .: Radio and communications, —1990-464 ISBN: 5-256-00852-8
Slepov N.N. Synchronous Digital Network SDH. - M .: Eco-Trends, -1998, 148c. ISBN - 5-88405-002-X

[1] Shuvalov V.P. , Zakharchenko N.V. , Shvartsman V.O. et al. Transmission of discrete messages: Textbook for high schools / ed. V.P. Shuvalova. - M .: Radio and communications, 1990 .-- 464 p. - ISBN 5-256-00852-8 .