Circuit system including first circuit sub-system, second circuit sub-system and bidirectional bus, circuit sub-system and method

摘要

A circuit system has a first and a second circuit sub-system, and a bidirectional bus, the first circuit sub-system having a first control circuit that receives a control signal for controlling the direction of the bidirectional bus, and controls the first sub-system to be either of a transmitting or a receiving state based on a state of the control signal, a first sending unit that receives the control signal, and outputs as a first control signal, and a second sending unit that receives the control signal, and outputs as a second control signal, the second circuit sub-system having a first receiving unit that receives the first control signal, a second receiving unit that receives the second control signal, and a second control circuit that controls the second sub-system to assume either the transmitting or the receiving state on the basis of the first and the second control signal.