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. 06, 2021
Filed:
Jun. 17, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Hideki Shimauchi, Tokyo, JP;
Akio Kamimurai, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A semiconductor integrated circuit includes: a main circuit; a non-volatile memory; and a self-diagnosis circuit configured to execute, when the semiconductor integrated circuit is to be powered off, self-diagnosis processing in which the main circuit is diagnosed and a diagnosis execution record indicating whether the diagnosis is completed and a diagnosis result indicating a result of the diagnosis are stored in the non-volatile memory. The self-diagnosis circuit is configured to: determine, when the semiconductor integrated circuit is powered on, whether there is a failure in the main circuit by reading the diagnosis execution record and the diagnosis result out of the non-volatile memory; and shift a state of the main circuit to a safe state when determining that there is a failure in the main circuit, and instruct the main circuit to start normal operation when determining that there is no failure in the main circuit.