Reliable time-domain demarcation of split formats in embedded-se

Details Reliable time-domain demarcation of split formats in embedded-se Reliable time-domain demarcation of split formats in embedded-se

1993-12-23

1995-05-23

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

G11B 509

Patent

active

054186595

ABSTRACT:
A demarcation circuit of the read channel of a disk drive identifies when the last byte of data prior to a servo block has been read, regardless of where the servo block is positioned, by generating an interrupt signal in response to the leading edge of a multi-byte marking signal when a time out signal is present. The time out signal is generated after a predetermined number of clock signals have been counted following the beginning of a servo block. The multi-byte marking signal is generated after a predetermined number of bytes have been counted. By insuring that the total number of bytes between servo blocks is a multiple of the predetermined number of bytes, the multi-byte signal will, at one point in time, identify the last byte of data. The time out signal can be used to identify the last multi-byte marking signal by properly selecting the predetermined number of clock signals and by insuring that the time required to read the predetermined number of bytes is greater than a timing error which results from variations in the spindle speed.

REFERENCES:
patent: 4214280 (1980-07-01), Halyhill et al.
patent: 5162954 (1992-11-01), Miller et al.
patent: 5257143 (1993-10-01), Zangenehpour
patent: 5274509 (1993-12-01), Buch
patent: 5276564 (1994-01-01), Herring et al.
patent: 5285327 (1994-02-01), Hetzler
National Semiconductor SFFDC Small Form Factor Disk Controller Specification, Oct. 25, 1992. The Examiner's attention is specifically drawn to pp. 14, 21-22, and 40.
Non-Disclosure Agreement between National Semiconductor and Aura Associates dated Aug. 2, 1991.
Data Sheet for Cirrus Logic CL-SH360 dated Apr. 1992.

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