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:
Dec. 17, 1996
Filed:
Jun. 07, 1995
Kouki Noguchi, Tokyo, JP;
Kiyokazu Nishioka, Odawara, JP;
Shinya Ohba, Shiroyama-machi, JP;
Susumu Narita, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A logic LSI has a plurality of modules such as a CPU contained in one chip. Frequency changing conditions, signals for designating modules whose frequencies are changed for each frequency changing condition, and signals for designating frequencies to be changed are stored in a storage device of a frequency controller, software-wise. The sequentially-input status of the logic LSI is compared with the stored frequency changing conditions and, when the former conforms to the latter, a signal for changing the corresponding frequency is applied to each of the plurality of modules. Each of the modules generates a plurality of internal clocks in synchronization with the basic clock and selects one out of the internal clocks according to the frequency changing signal.