ATM BUS SYSTEM

PROBLEM TO BE SOLVED: To flexibly correspond to the increase of information quantity and information types accompanying multiplication of media, the securing of a real time property and the change in the scale of data to be processed and a generated pattern. SOLUTION: An ATM bus 11 is the bus transferring information based on an ATM transfer mode, and bus users 10a to 10d and a bus arbitration circuit 12 are connected. A control bus 8 is the bus transferring a control signal transmitted when the respective bus users 10a to 10d are controlled. The bus arbitration circuit 12 selects a single bus use request among bus use requests when the bus users 10a to 10d simultaneously transmit the bus use requests and informs all the bus users of information displaying the bus user being the originating source of the selected bus use request. Thus, only the selected bus user uses the ATM bus 11 and starts an information transfer operation.