Disc sequencer supporting pipelined and non-pipelined read
US6693753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Oct 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc sequencer incorporating parallel state machines to support both pipelined and non-pipelined read modes is disclosed. The parallel state machines include a first state machine and a second state machine for controlling whether data are read from a disc media and transferred to a buffer via a channel interface coupled to a read/write channel. Data may be read through the read/write channel in either pipelined or non-pipelined mode. If an operational state of either state machine is active, then the transfer of data between a read/write head accessing the media and the buffer is enabled. The operational state of the first state machine is dependent on the operational state of the second state machine such that if the second state machine is active, the operational state of the first machine will go active on the following clock period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.