| 摘要 |
PROBLEM TO BE SOLVED: To provide a data transfer unit, which transfers data of a transfer source to a transfer destination having a discontinuous storage area, particularly reduces the amount of transfer data, and efficiently transfers data. SOLUTION: A data transfer unit includes, when transferring the transfer data to the transfer destination circuit having a discontinuous storage area: storing only transfer data for which updating is necessary in the storage means of the transfer source; transferring the transfer data by a transfer control means; temporarily storing the transfer data in a register provided in a transfer destination circuit; transferring the transfer data stored in the register to the discontinuous storage area of the transfer destination circuit according to the map information of a map register; and transferring only data for which updating is necessary to the transfer destination circuit. COPYRIGHT: (C)2009,JPO&INPIT
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