Electronic device system, controlling device and controlling method

摘要

An electronic device system of the invention has a controlling device and a controlled device interconnected via a data bus which complies with a predetermined communication format and which allows data to be exchanged between the devices. In a command transmission/reception transaction, the controlling device transmits a command to the controlled device. If an interim response is returned from the controlled device, the controlling device regards the transaction as complete and terminates the process without waiting for receipt of a final response from the controlled device.