Serial Communication EIA RS232, RS422 and RS485 Recommended Standard 232. The purpose of this course note is to attempt to describe the main elements in Serial Communication. This application note attempts to cover enough technical details of RS232, RS422 and RS485. EIA - Electroonic Industries Associatio. Characteristics of Communication Systems Must be a Sender and Receiver A protocol is a set of rules which governs the transfer of data between computers. Protocols allow communication between computers and networks. Handshaking is used to establish which protocols to use. Handshaking controls the flow of data between computers Protocols will determine the speed of transmission,.
