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:
Dec. 28, 1993
Filed:
Nov. 28, 1990
Michael R Diehl, Fort Collins, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An interface unit which can reduce the hardware cost by interfacing a microprocessor with an inexpensive memory device with a smaller word size without compromising the overall performance. The current invention improves the overall performance of the interface system by reducing the overhead address relatching without adding expensive and sophisticated pieces of hardware. This is accomplished by comparing a row address portion of the current address with that of the previous address. When a current address contains the same row address as the previously accessed memory-page, the current invention saves clock cycles by avoiding relatching of the row address portion of the address in the memory device. Such saving is significant when contiguous addresses are sequentially accessed.