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:
May. 27, 2003
Filed:
May. 17, 1999
Toshikazu Kuwano, Neyagawa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A programmable nonvolatile memory apparatus having a simplified circuit structure that eliminates a built-in sequencer circuit using a register ( ) as a source of generating control signals required for writing data in and erasing data from an EEPROM ( ). The register ( ) is provided from outside a microcomputer ( ) with a register address value inputted through an address bus ( ), and a data value inputted through a register bus ( ), and also register control signals, such as, a register write signal ( ), a register read signal ( ) and a register reset signal ( ). The register ( ) includes flip-flops. From the flip-flops, address data and rewriting data are outputted through buses ( ), and in addition, PRPM control signals ( to and ) are also outputted. The address space of the register ( ) and the address space of the EEPROM ( ) are separated from each other.