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:
Feb. 25, 1997
Filed:
Dec. 01, 1995
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An integrated circuit structure, having a central processing unit (CPU) formed as a part thereof, for configuring the CPU for operating in an operating mode selected from a plurality of possible operating modes. The possible operating modes include a first possible operating mode that operates exclusively on internal memory storage elements, a second possible operating mode that operates exclusively on external memory storage elements via an external bus connected to a first portion of a plurality of general purpose I/O pins, and a third possible operating mode that operates on external memory storage elements via an external bus connected to a second portion of the general purpose I/O pins such that additional external I/O circuitry is necessary to handle I/O transfers.