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:
Jul. 28, 2020
Filed:
Oct. 10, 2019
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Masayuki Kamiyama, Chino, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/00 (2006.01); H03K 3/0231 (2006.01); G06F 1/14 (2006.01); H03B 5/36 (2006.01);
U.S. Cl.
CPC ...
H03K 3/0231 (2013.01); G06F 1/14 (2013.01); H03B 5/36 (2013.01); H03B 2200/008 (2013.01);
Abstract
A real-time clock device includes an oscillation circuit configured to generate an oscillation signal using a resonator, a clocking circuit configured to generate present time data based on the oscillation signal, an interface circuit configured to receive a time rewriting request and time rewriting data for the present time data from an external device, and a control circuit configured to perform comparison processing of the present time data of the clocking circuit and the time rewriting data to determine whether the time rewriting data is legitimate.