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:
Mar. 08, 2005
Filed:
Feb. 07, 2003
Masahiko Tomizawa, Tama, JP;
Masahiko Nishiyama, Ome, JP;
Masahiko Tomizawa, Tama, JP;
Masahiko Nishiyama, Ome, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Ulsi Systems Co., Ltd., Tokyo, JP;
Abstract
A semiconductor integrated circuit device comprises a control unit for switching a mode about the trimming or estimation in an internal circuit, the control unit including a controller capable of realizing the mode switching control about the trimming or estimation by the JTAG method. The controller includes an instruction decoder for decoding an input instruction, a shift scan register circuit for enabling a boundary scan based on the decoded result of the instruction decoder, and an operation controller for controlling the operations of the instruction decoder and the shift scan register circuit. Therefore, the trimming becomes possible after sealing a semiconductor chip into a package.