Direct memory access controller for carrying out data...

Details Direct memory access controller for carrying out data... Direct memory access controller for carrying out data...

2007-06-05

2007-06-05

Huynh, Kim (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S022000, C710S027000, C710S028000, C709S212000

Reexamination Certificate

active

10133742

ABSTRACT:
An address region of an internal bus wherein a burst access can be utilized in an external bus is set in an address table. A DMA control unit determines whether or not a burst access can be utilized in the external bus by comparing an address in an access to the internal bus with an address region set in the address table. Then, the DMA control unit carries out a direct memory access transfer by utilizing a burst access when it is determined that the burst access can be utilized in the external bus. Accordingly, the DMA control unit can carry out a DMA transfer by using a burst access without the intervention of a FIFO memory and it becomes possible to carry out a high speed DMA transfer.

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Tetsuya Kagemoto, et al, “DMA Controller in Which Bus Access Ration Can Be Set”U.S. Appl. No. 09/822,361, filed Apr. 2, 2001.

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