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:
Aug. 12, 2003
Filed:
May. 11, 2000
Kenji Kubo, Hyogo, JP;
Other;
Abstract
A microcomputer comprises a selecting unit for selecting one of a plurality of clock signals generated by a plurality of clock generating sources according to a selection instruction from a central processing unit or CPU, a clock generation stop unit, responsive to a stop instruction to stop generation of a clock signal other than the selected clock signal from the CPU, for causing a corresponding clock generating source to stop the generation of the clock signal, and an unauthorized stop process detecting unit, responsive to a stop instruction to stop the generation of the selected clock signal from the CPU, for determining that the CPU has provided an instruction to perform an unauthorized process of causing a selected clock generating source to stop the generation of the selected clock signal. When the unauthorized stop process detecting unit determines that the CPU has provided an instruction to perform an unauthorized process of causing a selected clock generating source to stop the generation of the selected clock signal, it can furnish an interruption signal to the CPU.