Method for communication in a bidirectional bus system

摘要

A method for signal transmission and reception by a bidirectional bus system in which plural devices performing the communication of a command and a request are interconnected over a bidirectional bus is disclosed. The method includes the steps of constituting a frame of a transmission signal on the bidirectional bus from an address field for designating addresses of communicating devices and a data field for designating the command or request to be transmitted, and inserting the discriminating information for discrimination between the command and the request at a pre-set position in the data field. The transmission signals having the discrimination information is transmitted over the bidirectional bus to other devices. A communication system employing such bidirectional bus system is also disclosed.