Patent ID: 6948022

Claim:
A data transfer device for transferring the image data input from an image processing device to an electronic device, said device comprising: a conversion processing section for performing a predetermined conversion processing operation on the image data input from said image processing device; a graphic memory for temporarily storing the image data; a graphic control circuit for writing the image data transmitted from said conversion processing section into said graphic memory or reading the image data stored in said graphic memory and transmitting it to said electronic device; and a CPU for selecting a first data transmission route for transmitting the image data from said conversion processing section to said graphic control circuit or a second data transmission route for transmitting a control signal to said graphic control circuit; said conversion processing section being adapted to convert the image data input from said image processing device into an output format, wherein said CPU is provided with a CPU bus for controlling the component sections, an extension bus for connecting itself to peripheral elements including said graphic control circuit and a bus bridge circuit for control said extension bus; and said bus bridge circuit controls said extension bus as bus master and controls DMA transmissions of transmitting image data from said conversion processing section to said graphic control circuit.