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. 11, 1998
Filed:
Mar. 22, 1995
Seiko Instruments Inc., , JP;
Abstract
An EEPROM capable of arbitrarily setting a write time includes a timer circuit connected to a trimming circuit for determining a write time, and a trimming redundant memory array used for storing trimming data to be supplied to the trimming circuit in accordance with a predetermined write time so that the write time can be arbitrarily set. A series of calibration operations are performed such that the trimming data is read from the trimming redundant memory and supplied to the trimming circuit and the timer circuit is controlled so as to set the write time to a desired value. The latter operation is carried out in parallel to a normal write operation. Accordingly, neither special instructions nor an additional time period are required to perform the calibration operation, and a stable operation can be achieved in less time.