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. 03, 2004
Filed:
Aug. 09, 2002
Akira Maruyama, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
A non-volatile semiconductor integrated circuit is provided including a counter circuit that generates column addresses in synchronism with an external clock, and conducts a page programming sequence in word line units, wherein, when inputting program data, the program data is taken in synchronism with fallings and risings of the external clock. That is, program data is taken in synchronism with the risings and fallings of an XWE signal, such that the time for taking program data can be shortened by half. Also, the counter circuit that counts the external clock is driven by using a power supply voltage that is higher than the internal power supply voltage, such that operation delays in the counter circuit are reduced, the frequency of the external clock can be increased and thus the time for taking program data can be further shortened.