Data transfer apparatus

摘要

A buffer is provided between an image processor and image I/O unit and a shared memory to be accessed by those units in common, and the buffer is controlled so as to be used only for a specific access, and data transmission to the shared memory is also controlled. With respect to a single transmission request from the image processor and a burst transmission request from the image I/O unit, a selector is controlled such that the single transmission data is retained in the buffer and that the burst transmission to the shared memory is executed.