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:
Nov. 08, 1994
Filed:
Jul. 29, 1993
Applicant:
Inventor:
Hanumanthrao Nimishakavi, San Jose, CA (US);
Assignee:
Zilog, Inc., Campbell, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; G01R / ;
U.S. Cl.
CPC ...
371 221 ; 371 226 ; 371 223 ; 324 731 ; 3241581 ;
Abstract
A mode control circuit is disclosed which generates a mode control signal in response to an illegal state detected as a combination of inputs and outputs. An illegal state is forced by the application of a fixed voltage to an output pin. The mode control signal is used to switch input-output signals of a megacell internal to an application specific integrated circuit to the output pins of the package so that testing of the megacell is facilitated.