Controller circuit apparatus for CD-ROM drives

Details Controller circuit apparatus for CD-ROM drives Controller circuit apparatus for CD-ROM drives

1997-09-10

2000-05-09

Bragdon, Reginald G.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711105, 714756, 714 6, 714 42, 714769, 714784, G06F 1216, G06F 1108

Patent

active

060617608

ABSTRACT:
A controller circuitry for CD-ROM drive used for the storage of digital data, capable of reading data store on the CD-ROM disc and decoding to transfer the decoded data into the host computer system via an interface bus. Under the ISO 9660 standard, the controller circuitry includes a CIRC processor and an RSPC/EDC processor combined with a bus interface controller, each of which is capable of accessing a working memory device tied together. The combined circuitry configuration allows reduced access frequency in the working memory device, and there is no need to use internal high-speed SRAM. The entire controller circuitry may be fabricated as one single IC device to reduce cost while performance is improved.

REFERENCES:
patent: 4680764 (1987-07-01), Suzuki et al.
patent: 4866717 (1989-09-01), Murai et al.
patent: 5453996 (1995-09-01), Nakamura
patent: 5612933 (1997-03-01), Iso et al.
patent: 5627843 (1997-05-01), Deng et al.

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