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:
Jan. 06, 2004
Filed:
Dec. 27, 2000
Hitachi, Ltd., Tokyo, JP;
Abstract
An information processing equipment designed to support the compatibility of a plurality of clocks such as its internal clock and a clock for external bus interface by using only a single wired-in line for supplying the internal clock; and to perform frequency conversion control only in a logical circuit with the internal-to-external clock frequency ratio being N:1 or N:2 for the clocks, wherein the equipment comprises: a signal generator for supplying a common reference clock to itself and peripheral equipment and generating a reference sync signal from the reference clock to synchronize itself and the peripheral equipment; a signal generator for generating its internal clock from the reference clock; a signal generator for generating timing signals to control the timing of access to the external bus in accordance with an internal-to-peripheral clock frequency ratio; and a bus I/O signal conversion circuit for carrying out data input/output from/to the bus in accordance with generated timing signals.