DMA controller which provides multiple channels

Details DMA controller which provides multiple channels DMA controller which provides multiple channels

1997-03-14

1999-09-21

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

711151, 711154, G06F 1314

Patent

active

059548037

ABSTRACT:
In a DMA controller in accordance with the present invention, in the case of memory-to-memory data transfer using the DMA process (transfer for changing addresses inside the memory), one channel for carrying out the data transfer is provided. In the case of data transfer between the I/O device and a memory using the DMA process, two channels for carrying out the data transfer are, on the other hand, provided by using a circuit that constitutes said one channel. Thus, it is possible to provide multiple channels in the DMA controller by using a compact, inexpensive circuit construction.

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