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:
May. 31, 1994
Filed:
Mar. 05, 1993
Applicant:
Inventors:
Dandas K Tang, Tempe, AZ (US);
Timothy W Sutton, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307465 ; 307468 ; 364716 ;
Abstract
A buffer circuit for programming an I/O pin of a programmable logic device to function either as a normal I/O site, a power pin, or a ground pin has been provided. The I/O pin may be programmed by a user by simply placing first and second control signals in appropriate logic states. The buffer circuit also includes a tri-state circuit for providing tri-state outputs when functioning as a normal I/O site.