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:
Apr. 14, 2015
Filed:
Jan. 31, 2012
Hitoshi Yamamoto, Tokyo, JP;
Akio Idehara, Tokyo, JP;
Yasuhiro Tawara, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
Timers #through #are each supplied with a period for prohibiting a change in a power supply voltage. An OS #A or an OS #B determines necessity to change an operating frequency for a CPU core corresponding to any of the timers #through #when the timer exceeds the prohibition period. It is determined whether it is necessary to change a power supply voltage supplied to CPU cores #through #when the OS #A or the OS #B determines necessity to change an operating frequency. When it is determined that a power supply voltage needs to be changed, a power supply voltage change portionchanges the power supply voltage supplied to the CPU cores #through #. Therefore, it is possible to improve the processing efficiency without needing to acquire inter-OS lock.