| 摘要 |
PROBLEM TO BE SOLVED: To provide a DMA-forwarding method preventing forwarding errors in response data for DMA demands consisting of a plurality of channels. SOLUTION: In the DMA-forwarding method constituted of: an arbiter 1084 for adjusting the data demands of DMAC which is the source of demand for a plurality of data; and a data control part for carrying out data access demand to a data providing source such as an outside memory and administrating the exchange of forwarding data between the DMAC and the data supplying source, the DMAC outputs specified inside information with the demand signal when an access demand is made. The data control part is provided with a storage means 1083 for temporarily saving the access demand by the DMAC, which is permitted by the adjustment and the inside information paired with it. A checking means 1086 is also provided for checking the inside information saved in the storing means 1083 with the present inside information 1089 which is outputted from the output means at the time of reception of the response data for the access demand, and, when they do not match, for making the response data ineffective. COPYRIGHT: (C)2007,JPO&INPIT
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