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:
Jun. 18, 2002
Filed:
Mar. 27, 2001
Applicant:
Inventors:
Richard Hull, Puyallup, WA (US);
Eric Schroeder, Tempe, AZ (US);
Assignee:
Microchip Technology Incorporated, Chandler, AZ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/90175 ;
U.S. Cl.
CPC ...
H03K 1/90175 ;
Abstract
A multipurpose input/output circuit providing full input output current drive capability and special mode selection on a single device pin. The circuit includes first and second high voltage detectors coupled to the pin, at least one pin bias circuit, and a mode selector. The mode selector determines whether the pin operates as either an input or output. One of the high voltage detectors detects a high voltage on the pin and causes the bias circuit to disconnect the pin from the supply voltage. The other high voltage detector operates to detect a special mode voltage on the pin and set the device into a special mode.