The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Dec. 15, 1997
Hyung-Kyoon Kim, Seoul, KR;
Samsung Electronics Co., Ltd., Kyungki-do, KR;
Abstract
An apparatus implements a method of controlling a disk drive during initial stages of a wake-up mode when input of a command to the disk drive occurs during a sleep mode. Immediately upon receipt of a command input to a microprocessor controller (21) of the disk drive during sleep mode, power is restored to circuits (except for the spindle motor driver circuit) which were disabled during sleep mode. Then, a discrimination is made whether the input command is for picking up data from the disk and driving the disk to process the data. The discrimination is made by comparing the input command with a predetermined reference command stored in a memory (22) associated with the microprocessor. If the input command is not for driving the disk, the command is performed immediately. On the other hand, if the input command is determined to be for driving the disk, the command is performed only after power is applied to the spindle motor driver circuit (24) and the microprocessor controller (21) stands by for a predetermined time period. The stand by time period is to allow rotational speed of the disk to stabilize after energizing the motor driver to spin the disk. Accordingly, malfunctions caused by instability of the disk drive controller in the initial wake-up mode are be prevented.