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. 05, 1996
Filed:
Dec. 29, 1994
Applicant:
Inventors:
Peter Muhmenthaler, Mu/ nchen, DE;
Hans-Dieter Oberle, Puchheim, DE;
Assignee:
Siemens Aktiengesellschaft, Mu/ nchen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365201 ; 371 225 ; 371-15 ;
Abstract
A semiconductor memory is subdivided into a plurality of function units and has m leads addressable from outside, internal signal lines leading from the function units to the leads, internal signal lines connecting the function units with one another, and a test unit recognizing a test mode from a code word applied to k leads, where k.ltoreq.m. A device switches over from a memory mode to the test mode. The test unit decouples at least one of the signal lines leading to the leads from an associated lead of the semiconductor memory and connects the lead to an internal signal line connecting the function units.