Direct memory access (DMA) controller with programmable bus rele

Details Direct memory access (DMA) controller with programmable bus rele Direct memory access (DMA) controller with programmable bus rele

1995-02-28

1996-05-14

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358468, 395842, 395845, 395287, 395293, H04N 121, G06F 1316, G06F 1328, G06F 13362

Patent

active

055173250

ABSTRACT:
The present invention relates to an image data transfer controller. In the present invention, transfer processing for acquiring a right to control a bus and performing DMA transfer of image data corresponding to a set number of data to be continuously transferred and bus release processing for releasing the acquired right to control a bus during a set bus release period are repeatedly performed until a predetermined number of image data are transferred. The set value of the number of data to be continuously transferred and the set value of the bus release period are changed on the basis of the state of a request to use the bus.

REFERENCES:
patent: 4635191 (1987-01-01), Boing
patent: 5193193 (1993-03-01), Iyer
patent: 5297242 (1994-03-01), Miki

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