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:
Feb. 24, 2015
Filed:
Jun. 21, 2011
Applicants:
Minoru Nakaide, Tokyo, JP;
Shinichi Toda, Tokyo, JP;
Inventors:
Minoru Nakaide, Tokyo, JP;
Shinichi Toda, Tokyo, JP;
Assignee:
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 11/00 (2006.01); G06F 11/273 (2006.01); G06F 12/10 (2006.01); G06F 12/14 (2006.01); G06F 11/22 (2006.01);
U.S. Cl.
CPC ...
G06F 11/273 (2013.01); G06F 12/10 (2013.01); G06F 12/1491 (2013.01); G06F 11/2215 (2013.01); G06F 12/145 (2013.01);
Abstract
A CPU changes the operating mode to a test mode in which the CPU does not terminate a program being executed even if an MMU outputs a CPU exception notification, outputs an address signal for causing the MMU to output a CPU exception notification to the MMU in the test mode, and detects whether or not a CPU exception notification is input after the address signal is output to the MMU. This allows inspection as to whether or not a fault that prevents detection of an illegal access has occurred in the MMU while executing another program.