| 摘要 |
PURPOSE:To reduce a burden of a host computer, and to simplify an interface by providing a processor in the inside, managing both a hard disk device and a backup device, and also providing a DMA function. CONSTITUTION:A processor part 2 consists of a processor unit 21 and a ROM/ RAM22, and executes a management of the whole operation of an LSI1 and a control, etc. of a direct memory access (DMA). A data transfer to a host computer is executed based on an operation of a DMA controlling circuit 32 of a host interface part 3. A disk control part 4 executes a processing corresponding to a format of a disk and generates an interface signal of each device. At the same time, a control of a cyclic redundancy check is executed. These executions are all operated under a management of the processor part 2, a state of the operation and its result are analyzed by the processor part 2, and an appropriate processing is executed.
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