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:
Jun. 20, 2000
Filed:
Apr. 28, 1998
Masayuki Kitagawa, Irvine, CA (US);
Koji Tsuboi, Irvine, CA (US);
Abstract
A device controller for controlling the operation of the drive device. The controller includes a microprocessor, a volatile memory, and a non-volatile memory. The non-volatile memory stores an uncompressed decompression program and a compressed device operating program. The microprocessor automatically decompresses the device operating program by executing the decompression program and stores the decompressed device operating program into the volatile memory when the drive is powered up or reset. The microprocessor then executes the device operating program stored in the volatile memory which has a faster data access rate than the non-volatile memory. As the device operating program is stored in a compressed form, the size of the non-volatile memory is minimized. The present invention may also reduce the size of a non-volatile memory for storing data used in a device controller.