DATA COMMUNICATION SYSTEM BASED ON SERIES BUS AND MONITOR STATION USED IN DATA COMMUNICATION SYSTEM

摘要

PURPOSE: To obtain a communication system which allows a flexible test by providing the monitor station which has a specific function. CONSTITUTION: This is a data communication system based upon a serial bus 28 having transmitter receivers 20, 22, and 24 which communicate multi-bit messages in frames having a start signal, an address signal, and a data signal to one another and are so coupled as to include a control signal and in-frame interaction is maintained so that an arbitrary frame is equipped with both write information and read information belonging to a master station. Then a bus interface for a bus signal is provided, and a monitor station 30 which emulates a neutral receiver station irrelevantly to the source station of a signal and a frame buffer 45 which stores relative parts of received frames and feeds them unconditionally by the interface are provided.