Controller of multi function device

An image process device including an image process unit and a system control unit,

• wherein
• the image process unit comprises:
• an image input interface that receives inputs of image data from an image input device;
• data packet generating means for generating data packets from image data;
• first packet transfer means for transferring the data packets to the system control unit;
• and
• an image output interface that outputs image data to an image output device,
• the system control unit comprises:
• memory control means for having a memory store the data packets transferred from the image process unit and reading out the data packets from the memory;
• and
• second packet transfer means for transferring the data packets to the image process unit, and
• the first and second packet transfer means transfer packets using mutually different connection paths between the system control unit and the image process unit.