Data transfer controlling device for use in a direct memory acce

Details Data transfer controlling device for use in a direct memory acce Data transfer controlling device for use in a direct memory acce

1993-01-11

1996-10-01

Barry, Lance Leonard

Boots, shoes, and leggings

395846, 395854, 395855, 39542107, 364DIG1, 3642423, 36424234, 364251, 3642511, G06F 1328

Patent

active

055618162

ABSTRACT:
A data transfer controlling device of a direct memory access controller (DMAC) type includes a transfer number data storage, a transfer number updating decrementer, a data setter for setting predetermined initial data in the transfer number data storage, a terminal counter with a decrementer or an area counter with a decrementer, a memory address register, an address updating section, and a DMA execution control section. The number of times of transfer for the subsequent DMA transfer is automatically set when the number of DMA transfers to be successively executed in response to each DMA transfer request has been completed. Immediately thereafter, the DMA transfer is repeated in response to the subsequent DMA transfer request. When the DMA transfer has been completed to the final data in the DMA transfer source region of a memory, it is placed in an inhibited state. Thus, DMAC can respond to the DMA transfer request issued from a peripheral device at a high speed.

REFERENCES:
patent: 4346439 (1982-08-01), Huno et al.
patent: 4723223 (1988-02-01), Hanada
patent: 4797809 (1989-01-01), Sato et al.
patent: 5081622 (1992-01-01), Nassehi et al.
patent: 5214645 (1993-05-01), Hagirahim
patent: 5247671 (1993-09-01), Adkins et al.
patent: 5249279 (1993-09-01), Schmenk et al.
patent: 5280578 (1994-01-01), Kamiymama et al.
patent: 5287471 (1994-02-01), Katayose et al.
patent: 5347634 (1994-09-01), Herrell et al.

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