| 摘要 |
PROBLEM TO BE SOLVED: To provide a DMA transferring device capable of preventing the overwrite of data, and realizing data transfer with high reliability. SOLUTION: This DMA transferring device is provided with a register 20 for offset which sets the number of cycles of DMA transfer to be executed after a DMA request signal is withdrawn at the time of DMA transfer in a burst mode and an adder 21 which adds the set value of the register 20 for offset to the count value of a writing address counter part 13. The number of times of DMA transfer to be executed after the DMA request signal is withdrawn at the time of DMA transfer in the burst mode is preliminarily set in the register 20 for offset, and the set value is added to the value of the writing address counter part 13 by the adder 21, and the added value is compared with the value of a reading address counter part 14 so that the DMA transfer request signal can be withdrawn before the desired number of times of DMA transfer only by the number of times of DMA transfer set by the setting means.
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