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:
Sep. 24, 1996
Filed:
Feb. 14, 1994
Gregory A Racino, Austin, TX (US);
Jeffrey R Jorvig, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A pseudo-static mask option register (50) combines features of both a continuous refresh design and a static latched mask option register design. Pseudo-static mask option register (50) removes a mask option function from a main user memory (48) such that the functionality of the mask option register (50) is not limited by a plurality of electrical characteristics of the main use memory (48). When using the pseudo-static mask option register (50), a memory state of each memory bit (64, 66, 68) is read at any time. Additionally, a portion of the memory bits (64, 66, 68) is periodically refreshed such that pseudo-static mask option register (50) maintains an integrity of a value stored therein while minimizing power consumption. Pseudo-static mask option register (50) also has a non-volatile output state to allow emulation of mask options which are vulnerable to electrical disturbances.