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:
Jan. 01, 2002
Filed:
Oct. 17, 2000
Tadashi Onodera, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A semiconductor memory device is disclosed that is capable of outputting in the fastest possible time the first of serial data that are read in bursts, despite the increase in capacity of a memory cell array. In this semiconductor memory device, for a single address access, a plurality of bits of serial data are read in a burst from a memory sub-array that is made up by memory cell arrays U and U or memory cell arrays L and L In order that the serial data that are read first are the data of bit regardless of the operation mode of the semiconductor memory device, each individual memory sub-array is divided between portions for even data and portions for odd data and the even memory cell arrays U and L in which the data of bit are stored are arranged closer to the data amplifier than the odd memory cell arrays U and L The maximum length of I/O lines that are used in reading even data is therefore about half that of the maximum length of I/O lines that are used in reading odd data.