| 摘要 |
A data transfer apparatus has a controller configured to read out data in a predetermined sequential address area in units of a first byte count and to perform control for transferring the read-out data to a length register having a data area of a second byte count, the second byte count being the first byte count n times, where n is an integer equal to or more than "1", a mask generator configured to generate mask information so that data already stored into the length register is not overwritten and to provide the controller with the mask information, when last data included in data in the predetermined address range read out from the memory is stored into the length register, and a bit circular configured to circulate each bit of data stored in the length register by the number of bytes in accordance with a lower side bit string of a start address of data in the predetermined address area read out from the memory.
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