Abstract: It is the objective of the present invention to provide an image forming apparatus that has a plurality of functions, such as a printer function, a scanner function and a facsimile communication function, wherein first bus connection means is compatible with HighSpeed USB and second bus connection means is compatible with FullSpeed USB, and wherein HighSpeed USB communication can be performed with a data processing terminal, such as a personal computer. The image processing apparatus includes two bus connection means having different communication speeds. One of the bus connection means is first bus connection means, connected to the main controller, and the other bus connection means is second bus connection means, for connecting the main controller and a plurality of data processing portions to perform bi-directional communication.

Abstract: Image processing apparatus comprises, a first USB interface which connects with an external processing apparatus, a second USB interface which connects with a data processing unit, and a control unit which controls data transfer between the first USB interface and second USB interface. The control unit notifies the data processing unit of management data, which is managed by the control unit, via the second USB interface. The data processing unit generates status data of the data processing unit, including the notified management data. In response to a request from the external processing apparatus, the generated status data is transmitted to the external processing apparatus via the first USB interface and second USB interface.