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. 23, 2011
Filed:
Mar. 17, 2008
Masato Momii, Chitose, JP;
Masato Momii, Chitose, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A semiconductor integrated circuit device capable of shortening a chip reset period (time) is provided. The semiconductor integrated circuit device has a nonvolatile memory which performs a reading operation of trimming information after completion of precharge of a data line, and a power-on reset circuit () which starts an operation in response to power-on to reset a control circuit of the nonvolatile memory. The device further has a power-on precharge circuit () which starts an operation in response to the power-on to perform the precharge operation of the data line. The power-on reset circuit () includes a first CR operation circuit () which produces a reset release signal indicative of change of a voltage level at a time point when a first predetermined time period (T) elapses from the power-on. The power-on precharge circuit () includes a second CR operation circuit () which produces a precharge completion signal indicative of change of a voltage level at a time point when a second predetermined time period (T) elapses from the power-on. The first predetermined time period (T) is longer than the second predetermined time period (T).