Patent ID: 7287104

Claim:
An interface circuit capable of allowing transmission of data from a detachable card-type memory, which requires access by sectors, to an electronic device, said interface circuit comprising: a reading unit that reads document image data for the electronic device including at least one of a printer, a copying machine, and a facsimile from a plurality of sectors within the card-type memory; a buffer in the reading unit that stores the image data read and has a capacity to store data for the plurality of sectors; a receiver that receives from the electronic device a read-access control command for the image data stored in the buffer; a data checker that decides whether the image data corresponding to the read-access control command exists among the data stored in the buffer; and a transmitter that transmits the image data from the buffer to the electronic device when the data checker decides that data corresponding to the read-access control command exists among the data stored in the buffer.